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                                                                     EXHIBIT 4.3





                        TRANSAMERICAN ENERGY CORPORATION

                         SECURITY AND PLEDGE AGREEMENT

                                       by

                        TRANSAMERICAN ENERGY CORPORATION

                                  in favor of

                        FIRSTAR BANK OF MINNESOTA, N.A.
                  as Indenture Trustee for the Holders of the
                     11 1/2% Senior Secured Notes due 2002
                   13%Senior Secured Discount Notes due 2002





                           Dated as of June 13, 1997
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                        TRANSAMERICAN ENERGY CORPORATION
                         SECURITY AND PLEDGE AGREEMENT

                 This Security and Pledge Agreement (this "Agreement") is made
and entered into as of June 13, 1997 by TransAmerican Energy Corporation, a
Delaware corporation (the "Company"), in favor of Firstar Bank of Minnesota, as
trustee (the "Indenture Trustee") for the Noteholders (hereafter defined) under
the Indenture described herein.

                                    RECITALS

                 WHEREAS, the Company has entered into an Indenture dated as of
June 13, 1997 (as it may from time to time be amended or modified and in
effect, the "Indenture") with the Indenture Trustee; and

                 WHEREAS, pursuant to the Indenture, the Company has issued
$425,000,000 aggregate principal amount of 13% Senior Secured Notes due 2002
and $1,105,000,000 aggregate principal amount of 13% Senior Secured Discount
Notes due 2002 (the "Notes"); and

                 WHEREAS, contemporaneously with the issuance of the Notes, the
Company shall make loans to TransAmerican Refining Corporation, a Delaware
corporation ("TARC"), and to TransTexas Gas Corporation, a Delaware corporation
("TransTexas"), and such loans are evidenced by (i) that certain Loan Agreement
dated as of June 13, 1997 (the "TARC Intercompany Loan Agreement") executed by
TARC in favor of the Company, and (ii) that certain Loan Agreement dated as of
June 13, 1997 (the "TransTexas Intercompany Loan Agreement") executed by
TransTexas in favor of the Company; and

                 WHEREAS, TARC's obligations under the TARC Intercompany Loan
Agreement are further evidenced by that certain promissory note in the amount
of $920,000,000 dated as of June 13, 1997 (the "TARC Intercompany Note"), and
executed by TARC in favor of the Company, and TransTexas' obligations under the
TransTexas Intercompany Loan Agreement are further evidenced by that certain
promissory note in the amount of $450,000,000 dated as of June 13, 1997 (the
"TransTexas Intercompany Note" and, together with the TARC Intercompany Note,
the "Intercompany Notes"), and executed by TransTexas in favor of the Company;
and

                 WHEREAS, the obligations of TARC under the TARC Intercompany
Note and the TARC Intercompany Loan Agreement are secured by (i) that certain
Security and Pledge Agreement dated as of June 13, 1997 (the "TARC Security
Agreement") executed by TARC in favor of the Company and (ii) that certain Act
of Mortgage, Security Agreement and Financing Statement dated as of June 13,
1997 (the "TARC Mortgage" and, together with the TARC Intercompany Loan
Agreement, the TARC Intercompany Note and the TARC Security Agreement, the
"TARC Loan Documents"); and

                 WHEREAS, the obligations of TransTexas under the TransTexas
Intercompany Note and the TransTexas Intercompany Loan Agreement are secured by
(i) that certain Security and Pledge Agreement dated as of June 13, 1997 (the
"TransTexas Security Agreement") executed by TransTexas in favor of the
Company, (ii) that certain Mortgage, Deed of Trust, Assignment of Production,
Security Agreement and Financing Statement dated as of June 13, 1997 (the
"TransTexas Alabama Mortgage"), (iii) that certain Mortgage, Deed of Trust,
Assignment of Production, Security Agreement and Financing Statement dated as
of June 13, 1997 (the "TransTexas Texas Mortgage"), (iv) that certain Mortgage,
Deed of Trust, Assignment of Production, Security Agreement and Financing
Statement dated as of June 13, 1997 (the "TransTexas Mississippi Mortgage"),
(v) that certain Mortgage, Deed of Trust, Assignment


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of Production, Security Agreement and Financing Statement dated as of June 13,
1997 (the "TransTexas North Dakota Mortgage") and (vi) that certain Act of
Mortgage, Security Agreement and Financing Statement dated as of June 13, 1997
(the "TransTexas Louisiana Mortgage" and, together with the TransTexas
Intercompany Note, the TransTexas Intercompany Loan Agreement, the TransTexas
Security Agreement, the TransTexas Alabama Mortgage, the TransTexas Texas
Mortgage, the TransTexas Mississippi Mortgage and the TransTexas North Dakota
Mortgage, the "TransTexas Loan Documents"); and

                 WHEREAS, in order to secure the payment and performance in
full of the Indenture obligations of the Company, the parties hereto desire to
set forth their mutual understanding and certain agreements regarding the terms
and conditions of the grant of a security interest in the Company UCC
Collateral, the Assigned Collateral and the Pledged Collateral (as defined
below);

                 NOW, THEREFORE, for good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the Company and the
Indenture Trustee hereby agree as follows:

         Section 1. Definitions.

                 (a)      As used in this Agreement, capitalized terms not
         otherwise defined herein have the meanings set forth in the Indenture,
         and the following terms shall have the respective meanings set forth
         below (such meanings to be equally applicable to both the singular and
         plural forms of the terms defined):

                 "Assigned Collateral" shall have the meaning assigned to that
         term in Section 2 of this Agreement.

                 "Collateral" shall have the meaning assigned to that term in
         Section 2 of this Agreement.

                 "Default" and "Event of Default" shall have the meanings
         assigned to those  terms  in Section 6(a) of this Agreement.

                 "Disbursement Account" means the account or accounts owned by
         the Company and created by that certain Disbursement Agreement by and
         among the Company, TARC, the disbursement agent named therein, or its
         successor, and the construction supervisor named therein, as amended
         pursuant to the terms thereof.

                 "GAAP" means generally accepted accounting principles of the
         United States of America, consistently applied.

                 "Obligations" shall have the meaning assigned to that term in
         Section 2 of this Agreement.

                 "Indebtedness" means the following indebtedness and
         liabilities of the Company (and any extensions, renewals, refunding,
         increases, substitutions, replacements, consolidations, modifications
         or rearrangements of such indebtedness and liabilities, regardless of
         whether the Company executes any extension agreement or renewal
         instrument):

                          (i)     all amounts advanced or expended by the
                 Indenture Trustee under the Indenture and/or under or in
                 connection with this Agreement, all reasonable costs and





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                 out-of-pocket expenses (excluding expenses representing
                 administrative overhead) at any time and from time to time
                 incurred by the Indenture Trustee in connection with the
                 administration and/or enforcement of this Agreement
                 (including, without limitation, the reasonable fees and
                 out-of-pocket expenses of counsel employed by the Indenture
                 Trustee in connection therewith), and all indemnities at any
                 time and from time to time payable hereunder to the Indenture
                 Trustee, and

                          (ii)    all indemnities which relate to the Notes at
                 any time and from time to time payable to the Indenture
                 Trustee or the holders of the Notes (the "Noteholders") (or
                 any of them) under or in connection with the Indenture or any
                 related documents, ratably according to the amount owing to
                 the Indenture Trustee and each Noteholder, without preference
                 or priority among the Indenture Trustee and the Noteholders,
                 and

                          (iii)   all principal, premium and accrued interest
                 owing on the Notes, and

                          (iv)    all other amounts payable by the Company
                 under the Indenture.

                 "Pledged Collateral" shall have the meaning assigned to that
         term in Section 2 of this Agreement.

                 "UCC" means the Uniform Commercial Code as in effect in the
         State of New York.

                 "Vehicles" means all trucks, automobiles, trailers and other
         vehicles covered by a certificate of title.

                 (b)      All terms used in this Agreement which are defined in
         the UCC, other than those which are defined in the Indenture or
         specifically defined in Section 1(a) above, shall have the same
         meaning herein as in the UCC.

         Section 2. Grant of Security Interest.

                 (a)      The Company hereby grants to the Indenture Trustee
         for the benefit of the Noteholders, to secure the payment and
         performance in full of the Obligations, a security interest in and a
         lien on and so pledges and assigns to the Indenture Trustee for the
         benefit of the Noteholders all of the Company's right, title and
         interest in, to and under any and all of the following described
         property, assets and rights, in each case, wherever located, whether
         now owned or hereafter acquired or arising, all accessions and
         additions thereto, all substitutions and replacements therefor, and
         all proceeds and products thereof and assigns all rights in and to all
         collateral securing the following described property, assets and
         rights; provided, however, that this grant shall not include any of
         TARC's, TransTexas' or any other Subsidiary's right, title and
         interest in such described property:

                          (i)     all equipment, machinery, chattels, tools,
                 parts, machine tools, motor vehicles, furniture, fixtures and
                 supplies of every nature, including, without limitation,
                 Vehicles, drilling rigs, workover rigs, fracture stimulation
                 equipment, wellsite compressors, rolling stock and related
                 equipment and other assets accounted for as equipment by the
                 Company on its financial statements, all proceeds thereof, and
                 all documents of title, books, records, ledger cards, files,
                 correspondence, and computer files, tapes, disks and related
                 data processing software that at any time evidence or





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                 contain information relating to the foregoing (any and all
                 such property being the "Equipment");

                          (ii)    all inventory in all of its forms, including
                 without limitation, feedstocks, refined petroleum products,
                 acquired line pipe, casing, drill pipe and other supplies
                 accounted for as inventory by the Company on its financial
                 statements, all proceeds thereof, and all documents of title,
                 books, records, ledger cards, files, correspondence, and
                 computer files, tapes, disks and related data processing
                 software (any and all such property being "Inventory");

                          (iii)   all personal and fixture property of every
                 kind and nature including, without limitation, all furniture,
                 fixtures, raw materials, goods, contract rights, rights to the
                 payment of money (including, without limitation, all right
                 title and interest in and to the TARC Intercompany Loan
                 Agreement, the TARC Intercompany Note, the TransTexas
                 Intercompany Loan Agreement and the TransTexas Intercompany
                 Note), insurance refund claims and all other insurance claims
                 and proceeds, tort claims, chattel paper, documents,
                 instruments (including certificated securities), deposit
                 accounts and all general intangibles including, without
                 limitation, all uncertificated securities, tax refund claims,
                 license fees, patents, patent applications, trademarks,
                 trademark applications, trade names, copyrights, copyright
                 applications, rights to sue and recover for past infringement
                 of patents, trademarks and copyrights, computer programs,
                 computer software, engineering drawings, service marks,
                 customer lists, goodwill, and all licenses, permits,
                 agreements of any kind or nature pursuant to which the Company
                 possesses, uses or has authority to possess or use property
                 (whether tangible or intangible) of others or others possess,
                 use or have authority to possess or use property (whether
                 tangible or intangible) of the Company, and all recorded data
                 of any kind or nature, regardless of the medium of recording
                 including, without limitation, all software, writings, plans,
                 specifications and schematics (any and all such property being
                 the "Personal Property"); and

                          (iv)    any and all "accounts" as such term is
                 defined in Article 9 of the UCC (excluding all intercompany
                 accounts), all products and proceeds thereof, and all books,
                 records, ledger cards, files, correspondence, and computer
                 files, tapes, disks or software that at any time evidence or
                 contain information relating to the foregoing (any and all
                 such property, the "Receivables" and together with the
                 Equipment, Inventory and Personal Property, the "Company UCC
                 Collateral").

                 (b)      The Company also pledges to the Indenture Trustee for
         the benefit of the Noteholders, and grants to the Indenture Trustee
         for the benefit of the Noteholders a security interest in all of the
         Company's right, title and interest in, to and under any and all of
         the following described property, rights and interests, in each case,
         wherever located, whether now owned or hereafter acquired or arising,
         all accessions and additions thereto, all substitutions and
         replacements therefor, and all proceeds and products thereof
         (collectively, the "Pledged Collateral"):

                          (i)     all of the issued and outstanding shares of
                 common stock identified on Schedule 2(b) attached hereto of
                 TARC, TransTexas and any other subsidiary of the Company
                 presently existing or hereafter created or acquired (the
                 "Pledged Subsidiaries") therein set forth;





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                          (ii)    all other shares of common stock or other
                 equity securities now or hereafter owned or acquired by the
                 Company in any manner issued by the Pledged Subsidiaries, and
                 the certificates representing such securities, and any present
                 or future options, warrants or other rights to subscribe for
                 or purchase any property described in Schedule 2(b) or any
                 notes, bonds, debentures or other evidences of indebtedness
                 now or hereafter owned or acquired by the Company in any
                 manner that (A) are at any time convertible, exchangeable or
                 exercisable into capital stock or other equity securities of
                 the Pledged Subsidiaries or (B) have or at any time could by
                 their terms have voting rights with respect to any matter
                 affecting the Pledged Subsidiaries and all securities,
                 certificates and instruments representing or evidencing
                 ownership of any of the property described in Schedule 2(b)
                 hereof; provided, however, that in the event the Company
                 acquires any outstanding Common Stock Purchase Warrants of
                 TARC issued on February 23, 1995 (the "TARC Warrants")
                 pursuant to a tender offer by the Company for such TARC
                 Warrants, the Company shall promptly cancel such TARC Warrants
                 or contribute such TARC Warrants to TARC for prompt
                 cancellation, and in no event will such TARC Warrants be
                 included in the definition of "Pledged Collateral"; and

                          (iii)   all proceeds and products of the foregoing
                 and distributions thereof or with respect thereto, including
                 without limitation dividends, distributions, cash, instruments
                 and other property or securities, now or hereafter at any time
                 or from time to time received or receivable or otherwise
                 distributed or distributable in respect of or in exchange for
                 any or all of the foregoing.

                 (c)      The Company hereby also assigns to the Indenture
         Trustee for the benefit of the Noteholders and grants to the Indenture
         Trustee for the benefit of the Noteholders a security interest in,
         pledge of and lien on, the Disbursement Account and all investments,
         securities, financial assets credited thereto and security
         entitlements with respect thereto and all certificates and
         instruments, if any, from time to time representing or evidencing the
         Disbursement Account or any property credited thereto, whether now
         owned by the Company or existing or hereafter acquired, created or
         arising including the proceeds thereof (the "Assigned Collateral" and,
         together with the Company UCC Collateral and the Pledged Collateral,
         the "Collateral").

                          Subject to any Permitted Liens, pursuant to the terms
         hereof, the Company has endorsed, assigned and delivered to the
         Indenture Trustee, or such other Person that the Indenture Trustee has
         designated as its agent to hold for perfection purposes, all
         negotiable or non-negotiable instruments (including certificated
         securities) and chattel paper pledged by it hereunder, together with
         instruments of transfer or assignment duly executed in blank as the
         Indenture Trustee may have specified.  In the event that the Company
         shall, after the date of this Agreement, acquire any other negotiable
         or non-negotiable instruments (including certificated securities) or
         chattel paper to be pledged by it hereunder, the Company shall,
         subject to Permitted Liens, forthwith endorse, assign and deliver the
         same to the Indenture Trustee, or such other Person that the Indenture
         Trustee has designated as its agent to hold for perfection purposes,
         accompanied by such instruments of transfer or assignment duly
         executed in blank as the Indenture Trustee may from time to time
         specify.  To the extent that any securities are uncertificated,
         appropriate book-entry transfers reflecting the pledge of such
         securities created hereby have been or, in the case of uncertificated
         securities hereafter acquired by the Company, will at the time of such
         acquisition be, duly made for the account of the Indenture Trustee or
         one or more nominees of the Indenture Trustee with the issuer of such
         securities or other appropriate book-entry facility or financial
         intermediary, with the Indenture Trustee having at all times the





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         right to obtain definitive certificates (in the Indenture Trustee's
         name or in the name of one or more nominees of the Indenture Trustee)
         where the issuer customarily or otherwise issues certificates, all to
         be held as Collateral hereunder.  The Company hereby acknowledges that
         the Indenture Trustee may, in its discretion, appoint one or more
         financial institutions to act as the Indenture Trustee's agent in
         holding in custodial accounts instruments or other financial assets,
         including securities, in which the Indenture Trustee is granted a
         security interest hereunder, including, without limitation,
         certificates of deposit and other instruments evidencing short term
         obligations.

                 (d)      The inclusion of proceeds in this Agreement does not
         authorize the Company to sell, dispose of or otherwise use the
         Collateral in any manner not specifically authorized hereby or under
         the Indenture.

                 (e)      This Agreement secures the prompt and complete (i)
         payment of all obligations of the Company to the Indenture Trustee
         under the Indenture and to the Holders under the Notes, whether such
         obligations are now existing or hereafter arising, and all renewals,
         extensions, amendments, supplements and rearrangements thereof and
         (ii) payment and performance of all covenants and conditions by the
         Company contained herein and in the Indenture and the Notes in each
         case whether for principal, interest, prepayment premium, taxes,
         costs, losses, compensation, reimbursements, fees, expenses or any
         other amount payable to the Indenture Trustee under the terms of this
         Agreement (all such obligations, covenants and conditions described in
         the foregoing clauses (i) and (ii) being hereinafter collectively
         referred to as the "Obligations").

                 (f)      Notwithstanding anything contained herein to the
         contrary, the stock of an Accounts Receivable Subsidiary shall not
         constitute Collateral hereunder.

         Section 3. Representations and Warranties.  The Company represents and
warrants, as of the date hereof, to the Indenture Trustee and each Noteholder
as follows:

                 (a)      The chief executive office and principal place of
         business of the Company is located at 1300 N.  Sam Houston Parkway
         East, Suite 320, Houston, Harris County, Texas 77032.  Any and all
         Collateral not delivered to the Indenture Trustee or its designated
         agent is and will continue to be located only in the State of Texas.


                 (b)      The Company is the legal and beneficial owner of all
         of the Collateral free and clear of any lien, security interest,
         charge or encumbrance of any kind or nature, except for the lien and
         security interest created hereby and for Permitted Liens, and has not
         made any other pledge, assignment, mortgage, hypothecation or transfer
         of the Collateral except as permitted hereunder or under the
         Indenture.  Except for the lien and security interest created hereby,
         all of the Collateral is free from any material credit, deduction,
         allowance, defense, dispute, setoff or counterclaim and there is no
         material extension or indulgence with respect thereto.  The Pledged
         Collateral is not subject to any put, call, option or other right in
         favor of any other person whatsoever.

                 (c)      The Pledged Collateral is accurately described in
         Schedule 2(b) hereto and has been duly authorized and validly issued
         and non-assessable.





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                 (d)      This Agreement has been duly executed and delivered
         by the Company and creates a valid security interest in, and lien on,
         the Collateral securing the payment of the Indebtedness.  Upon the
         delivery of physical certificates evidencing the Pledged Collateral to
         the Indenture Trustee or its designated agent, delivery of the TARC
         Intercompany Note and the TransTexas Intercompany Note and the making
         of the filings and the taking of all other actions necessary to
         perfect the security interests created hereby, including, without
         limitation, those actions specified in Section 2(b) and Section 4, the
         security interests created by this Agreement will be duly perfected
         security interests subject to no equal or prior lien, security
         interest or encumbrance of any kind or nature other than Permitted
         Liens.

                 (e)      The Company has the requisite corporate power and
         authority to pledge the Collateral in the manner hereby done or
         contemplated and to defend its title thereto against the lawful claims
         of all persons whomsoever.

                 (f)      Neither the execution and delivery of this Agreement
         by the Company, the performance by the Company of its obligations
         hereunder, nor the transactions herein contemplated will (i) violate
         the Company's charter or bylaws, (ii) violate the terms of any
         agreement, indenture, mortgage, deed of trust, equipment lease,
         instrument or other document to which the Company is a party, (iii)
         violate any law, order, rule or regulation applicable to the Company
         of any court or any government, regulatory body or administrative
         agency or other governmental body having jurisdiction over the Company
         or its properties, or (iv) result in or require the creation or
         imposition of any lien (other than the lien contemplated hereby), upon
         or with respect to any of the property now owned or hereafter acquired
         by the Company, which violation or conflict would have a material
         adverse effect on the financial condition, business, assets or
         liabilities of the Company or on the value of the Collateral or a
         material adverse effect on the security interests hereunder.

                 (g)      The Pledged Collateral includes the issued and
         outstanding shares of Common Stock of the Pledged Subsidiaries as
         described in Schedule 2(b) attached hereto, and as of the date of
         execution hereof, there are no outstanding options, warrants or other
         rights to subscribe for or purchase any property described in Section
         2(b) or any notes, bonds, debentures or other evidences of
         indebtedness that (i) are at any time convertible into capital stock
         of the Pledged Subsidiaries or (ii) have or at any time could by their
         terms have voting rights with respect to any matters affecting the
         Pledged Subsidiaries.

                 (h)      No consent or approval which has not been obtained
         prior to the date hereof of any other person or entity and no
         authorization, approval or other action (other than delivery of
         physical certificates evidencing the Pledged Collateral) by, and no
         notice to or filing with any governmental body (other than UCC
         filings), regulatory authority or securities exchange, was or is
         necessary as a condition to the validity of the pledge hereunder of
         the Collateral, and  such pledge is effective to vest in the Indenture
         Trustee the rights of the Indenture Trustee in the Collateral as set
         forth herein.  There are no restrictions on the transferability of any
         of the Collateral transferred or delivered by the Company hereunder
         or, except for restrictions related to federal and state securities
         laws governing the sale of "restricted stock" or "control stock," with
         respect to the foreclosure, transfer or disposition thereof by the
         Indenture Trustee.

         Section 4.Covenants.   During the term of this Agreement and until all
the Obligations with respect to the Indebtedness have been fully and finally
paid and discharged in full, the Company covenants and agrees with the
Indenture Trustee and each Noteholder that:





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                 (a)      Except as permitted by the Indenture or in the
         ordinary course of business, the Company will not make any compromise
         or settlement with respect to the Collateral without notice to or
         consent of the Indenture Trustee.

                 (b)      The Company shall deliver to the Indenture Trustee or
         its designated agent concurrently with the execution of this Agreement
         or, to the extent acquired subsequent to the date of execution hereof,
         including without limitation Pledged Collateral issued by a newly
         created or acquired Subsidiary, immediately upon the Company's
         acquisition thereof: (i) all certificates and instruments representing
         the Pledged Collateral and a revised Schedule 2(b), and (ii) all
         certificates and instruments representing each other item of
         Collateral (including all certificates, instruments and notes
         representing any such Company UCC Collateral, including without
         limitation the Intercompany Notes).  Any and all Pledged Collateral
         delivered to the Indenture Trustee shall be accompanied by undated
         duly executed powers in blank and by such other instruments of
         transfer or documents as the Indenture Trustee may reasonably request.
         The Indenture Trustee may hold the certificates representing the
         Pledged Collateral delivered  to it in its own name or in the name of
         its nominee, all in form and substance satisfactory to the Indenture
         Trustee.

                 (c)      From time to time, the Company shall, at its own
         expense, promptly give, execute, deliver, file and/or otherwise
         formalize any such notice, statement, instrument, document, agreement
         or other papers, and do all such other acts and things, as may be
         necessary or desirable, or as the Indenture Trustee may reasonably
         request, in order to create, evidence, preserve, perfect, validate or
         continue any lien or security interest created pursuant to this
         Agreement or to enable the Indenture Trustee to exercise or enforce
         its rights hereunder with respect to such lien or security interest,
         or otherwise further to effect the purposes of this Agreement.
         Without limiting the generality of the foregoing, the Company shall,
         at any time or from time to time upon the request of the Indenture
         Trustee and at the Company's own expense, execute, acknowledge,
         witness, deliver, file and/or record such financing and continuation
         statements, notices, additional assignments and other documents or
         instruments (all of which shall be in form and substance satisfactory
         to the Indenture Trustee and its counsel) as the Indenture Trustee may
         from time to time reasonably request for the perfection of the liens
         and security interests created hereby.

                 (d)      The Company shall promptly notify the Indenture
         Trustee (i) of any material changes in any fact or circumstance
         represented or warranted by the Company with respect to any material
         portion of the Collateral, (ii) of any material impairment of the
         Collateral and (iii) of any claim, action or proceeding affecting
         title to all or any of the Collateral.

                 (e)      Except for the liens and security interests created
         by this Agreement and the Permitted Liens in the Collateral, the
         Company shall at its own expense defend the Collateral against any and
         all liens, claims, security interests and other encumbrances or
         interests, howsoever arising and shall maintain and preserve the
         security interest granted hereunder with respect to the Collateral as
         long as this Agreement shall remain in full force and effect.  The
         Company shall not make any other pledge, assignment, mortgage,
         hypothecation or transfer of the Collateral except as permitted
         hereunder or under the Indenture.

                 (f)      The Company shall at all times keep accurate and
         complete records with respect to the Collateral, including, without
         limitation, records of all payments made, credit granted and proceeds
         received in connection therewith.





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                 (g)      The Company shall not relocate its principal place of
         business or chief executive office to a county or state other than
         that specified in Section 3(a) of this Agreement unless the Company
         gives 30 days' prior written notice to the Indenture Trustee, which
         notice shall specify the county and state into which such relocation
         is to be made.  The Collateral, to the extent not delivered to the
         Indenture Trustee pursuant to Section 2, will be kept at those
         locations listed on the Perfection Certificate delivered to the
         Indenture Trustee herewith in the form attached as Exhibit A hereto
         and the Company will not remove the Collateral from such locations,
         without providing at least 30 days' prior written notice to the
         Indenture Trustee.

                 (h)      The Company will keep the Collateral in good order
         and repair, except in situations where not to do so would not be
         material, and will not use the same in violation of law or any policy
         of insurance thereon.  The Indenture Trustee, or its designee, may
         inspect the Collateral at any reasonable time, wherever located.

                 (i)      The Indenture Trustee, or its representative, shall
         at all times have full and free access during normal business hours to
         all of the books, correspondence and records of the Company relating
         to the Collateral (other than information that is privileged and
         confidential) and the Indenture Trustee and its representatives may
         examine the same, make abstracts therefrom and make photocopies
         thereof, and the Company agrees to render to the Indenture Trustee, at
         the Company's cost and expense, such clerical and other assistance as
         may be reasonably requested by the Indenture Trustee with regard
         thereto.

                 (j)      The Company shall not permit any of the Pledged
         Subsidiaries to issue to the Company any securities of the type
         required to be pledged hereunder unless such securities are promptly
         pledged and delivered hereunder to the Indenture Trustee in accordance
         with Section 2(b).

                 (k)      If, while this Agreement is in effect, any stock
         dividend, stock split, reclassification, readjustment, reorganization,
         merger, consolidation, exchange offer, tender offer or other change in
         the capital structure, including the creation of any subscription or
         other rights relating to the Pledged Collateral, is declared or made,
         or proposed to be declared or made, by any of the Pledged Subsidiaries
         or any other issuer of the Collateral, all substituted and additional
         securities or interest issued with respect to the Collateral and
         evidenced by certificates shall be endorsed in blank by the Company
         promptly upon receipt thereof or otherwise appropriately transferred
         to the Indenture Trustee or its designated agent in negotiable form,
         and all certificates or instruments evidencing such securities shall
         be delivered to the Indenture Trustee or its designated agent to be
         held under the terms of this Agreement in the same manner as, and as a
         part of, the Collateral.  All Pledged Collateral shall be evidenced by
         one or more certificates.  Any securities that may be issued upon
         exercise of any subscription or other rights relating to the Pledged
         Collateral shall be endorsed in blank and delivered to the Indenture
         Trustee or its designated agent with any necessary powers.

         Section 5. Powers of the Secured Party.

                 (a)      The Company hereby irrevocably designates and
         appoints the Indenture Trustee as its attorney- in-fact, with full
         power of substitution, for the purposes of carrying out the provisions
         of this Agreement and taking any action and executing any instrument,
         including,without limitation, any financing statement or continuation
         statement, and taking any other action to maintain the validity,
         perfection, priority and enforcement of the security interest





                                       9
   11
         intended to be created hereunder, that the Indenture Trustee may
         reasonably deem necessary or advisable to accomplish the purposes
         hereof, which appointment as attorney-in-fact is irrevocable and
         coupled with an interest.

                 (b)      Without limiting the generality of Section 5(a)
         hereof, the Company hereby irrevocably authorizes and empowers the
         Indenture Trustee for the ratable benefit of the Noteholders, upon the
         occurrence and during the continuation of any Event of Default, at the
         expense of the Company, either in the Indenture Trustee's own name or
         in the name of the Company, at any time and from time to time:

                          (i)     to ask, demand, receive, issue a receipt for,
                 give acquittance for, settle and compromise any and all monies
                 which may be or become due or payable or remain unpaid at any
                 time or times to the Company, and any and all other property
                 which may be or become deliverable at any time or times to the
                 Company, under or with respect to the Collateral;

                          (ii)    to exercise any rights or remedies of the
                 Company under the TARC Loan Documents and the TransTexas Loan
                 Documents;

                          (iii)   to endorse any drafts, checks, orders or
                 other instruments for the payment of money payable to the
                 Company on account of the Collateral (including any such
                 draft, check, order or instrument issued by any insurance
                 company payable jointly to the Company and the Indenture
                 Trustee); and

                          (iv)    to settle, compromise, prosecute or defend
                 any action, claim or proceeding, or take any other action, all
                 either in its own name or in the name of the Company or
                 otherwise, which the Indenture Trustee may deem to be
                 necessary or advisable for the purpose of exercising and
                 enforcing its powers and rights under this Agreement or in
                 furtherance of the purposes hereof, including any action which
                 by the terms of this Agreement is to be taken by the Company.

                 (c)      Nothing in this Agreement shall be construed as
         requiring or obligating the Indenture Trustee to make any commitment
         or to make any inquiry as to the nature or sufficiency of any payment
         received by it, or to present or file any claim or notice, or to take
         any other action with respect to any of the Collateral or any part
         thereof or the amounts due or to become due in respect thereof or any
         property covered thereby, or to collect or enforce the payment of any
         amounts assigned to it or to which it may otherwise be entitled
         hereunder at any time or times other than to account for amounts or
         Collateral received.

                 (d)      The Indenture Trustee shall be entitled at any time
         to file this Agreement, or a carbon, photographic or any other
         reproduction of this Agreement, as a financing statement, but the
         failure of the Indenture Trustee to do so shall not impair the
         validity or enforceability of this Agreement.  The Indenture Trustee
         shall have no duty to comply with any recording, filing or other legal
         requirements necessary to establish or maintain the validity, priority
         or enforceability of, or the Indenture Trustee's rights in or to, any
         of the Collateral.

                 (e)      In its discretion, the Indenture Trustee may
         discharge taxes and other encumbrances at any time levied or placed on
         any of the Collateral, make repairs thereto and pay any necessary
         filing fees.  The Company agrees to reimburse the Indenture Trustee on
         demand





                                       10
   12
         for any and all reasonable expenditures so made with interest on
         unpaid amounts at the maximum rate permitted by law.  The Indenture
         Trustee shall have no obligation to the Company to make any such
         expenditures, nor shall the making thereof relieve the Company of any
         default.

                 (f)      Anything herein to the contrary notwithstanding, the
         Company shall remain liable under each contract or agreement comprised
         in the Collateral to be observed or performed by the Company
         thereunder.  The Indenture Trustee shall not have any obligation or
         liability under any such contract or agreement by reason of or arising
         out of this Agreement or the receipt by the Indenture Trustee of any
         payment relating to any of the Collateral, nor shall the Indenture
         Trustee be obligated in any manner to perform any of the obligations
         of the Company under or pursuant to any such contract or agreement, to
         make inquiry as to the nature or sufficiency of any payment received
         by the Indenture Trustee in respect of the Collateral or as to the
         sufficiency of any performance by any party under any such contract or
         agreement, to present or file any claim, to take any action to enforce
         any performance or to collect the payment of any amounts which may
         have been assigned to the Indenture Trustee or to which the Indenture
         Trustee may be entitled at any time or times other than to account for
         amounts or Collateral received, and no action taken or omitted shall
         give rise to any defense, counterclaim or right of action against the
         Indenture Trustee, unless the Indenture Trustee's actions are taken or
         omitted to be taken with gross negligence or bad faith or constitute
         willful misconduct.  The Indenture Trustee's sole duty with respect to
         the custody, safe keeping and physical preservation of the Collateral
         in its possession, under Section 9-207 of the UCC or otherwise, shall
         be to deal with such Collateral in the same manner as the Indenture
         Trustee deals with similar property for its own account.

                 (g)      If an Event of Default has occurred and is
         continuing, the Indenture Trustee may at any time, at its option,
         transfer to itself or any nominee any securities constituting the
         Pledged Collateral, receive any income thereon and hold such income as
         additional Collateral or apply it to the Indebtedness.  Regardless of
         whether any Indebtedness is due, the Indenture Trustee may demand, sue
         for, collect, or make any settlement or compromise which it deems
         desirable with respect to the Collateral.  Regardless of the adequacy
         of Collateral or any other security for the Indebtedness, any deposits
         or other sums at any time credited by or due from the Indenture
         Trustee to the Company may at any time be applied to or set off
         against any of the Indebtedness.

                 (h)      If an Event of Default shall have occurred and be
         continuing, the Company shall, at the request of the Indenture
         Trustee, notify obligors on chattel paper and general intangibles of
         the Company and obligors on instruments for which the Company is an
         obligee of the security interest of the Indenture Trustee in any
         chattel paper, general intangible or instrument and that payment
         thereof is to be made directly to the Indenture Trustee or to any
         financial institution designated by the Indenture Trustee as the
         Indenture Trustee's agent therefor, and the Indenture Trustee may
         itself, if an Event of Default shall have occurred and be continuing,
         without notice to or demand upon the Company, so notify said obligors.
         After the making of such a request or the giving of any such
         notification, the Company shall hold any proceeds of collection of
         chattel paper, general intangibles and instruments received by the
         Company as trustee for the Indenture Trustee without commingling the
         same with other funds of the Company and shall turn the same over to
         the Indenture Trustee in the identical form received, together with
         any necessary endorsements or assignments.  The Indenture Trustee
         shall apply the proceeds of collection of chattel paper, general
         intangibles and instruments received by the Indenture Trustee to the
         Indebtedness, such proceeds to be immediately entered after final
         payment in cash of the items giving rise to them.





                                       11
   13
         Section 6.Voting Rights, Dividends, Etc.

                 (a)      Until an Event of Default shall have occurred and be
         continuing:

                          (i)     except as otherwise provided in this
                 Agreement, the Company shall be entitled to exercise any and
                 all voting or consensual rights and powers, including
                 subscription rights, in relation to the Pledged Collateral;
                 provided, however, that no vote shall be cast or consent,
                 waiver or ratification given or action taken which would
                 materially impair the securities or the value thereof or
                 violate any provision of this Agreement, the Indenture or any
                 other ancillary document;

                          (ii)    except as otherwise provided in this
                 Agreement, the Company shall be entitled to receive and retain
                 any and all dividends, distributions or other payments in
                 respect of the Pledged Collateral and the Indenture Trustee,
                 upon receipt of any of the foregoing, shall promptly pay or
                 distribute the same to the Company, and, to the extent so
                 permitted, any distributions received by the Company and
                 transferred to other persons shall pass free and clear of the
                 lien and security interest hereof; and

                          (iii)   the Indenture Trustee shall execute and
                 deliver to the Company or cause to be executed and delivered
                 to the Company, all such proxies, powers of attorney, dividend
                 orders and other instruments as the Company may reasonably
                 request for the purpose of enabling it to exercise the voting
                 or consensual rights and powers which the Company is entitled
                 to exercise pursuant to the foregoing Section 6(a)(i) or to
                 receive the dividends, distributions or other payments which
                 the Company is authorized to retain pursuant to the foregoing
                 Section 6(a)(ii).

                 (b)      Upon the occurrence and during the continuance of an
         Event of Default, all rights of the Company to exercise the voting or
         consensual rights and powers which the Company would otherwise be
         entitled to exercise pursuant to Section 6(a)(i) and to receive the
         dividends, distributions and other payments which the Pledgor would
         otherwise be authorized to receive and retain pursuant to Section
         6(a)(ii) shall automatically cease, and all such rights shall
         thereupon become vested in the Indenture Trustee, which shall then
         have the sole and exclusive right and authority to exercise, in its
         sole discretion, all such voting and consensual rights and powers  and
         to receive and retain as Collateral all such dividends, distributions
         and other payments.  Without limiting the foregoing, in such event the
         Indenture Trustee may exercise all voting and corporate rights at any
         meeting of any corporation issuing any such securities and any and all
         rights of conversion, exchange, subscription or any other rights,
         privileges or options pertaining to any such securities as if it were
         the absolute owner thereof, including, without limitation, the rights
         to exchange at its discretion, any and all such securities upon the
         merger, consolidation, reorganization, recapitalization or other
         readjustment of any corporation issuing any such securities or upon
         the exercise by any such issuer or the Indenture Trustee of any right,
         privilege or option pertaining to any such securities, and, in
         connection therewith, to deposit and deliver any and all securities
         with any committee, depository, transfer agent, registrar or other
         designated agency upon such terms and conditions as it may determine,
         all without liability except to account for the property actually
         received by it, but the Indenture Trustee shall have no duty to
         exercise any of the aforesaid rights, privileges or options and the
         Indenture Trustee shall not be responsible for any failure to do so or
         delay in so doing.

         Section 7. Default.





                                       12
   14
                 (a)      It shall constitute a Default or an Event of Default
         under this Agreement if a "Default" or an "Event of Default" shall
         occur under the Indenture.

                 (b)      If an Event of Default shall have occurred and is
         continuing and if the maturity of the Notes is accelerated under the
         provisions of the Indenture, in addition to any other rights and
         remedies that may be available to the Indenture Trustee under the UCC
         or the Indenture or under Section 5(a) or 5(b) of this Agreement or
         otherwise under this Agreement or at law, the Indenture Trustee, for
         the ratable benefit of the Noteholders, shall also have the following
         rights and powers:

                          (i)     The Indenture Trustee may, without being
                 required to give any notice except as hereinafter provided,
                 sell the Collateral, or any part thereof, at public or private
                 sale, for cash, upon credit or for future delivery and at such
                 price or prices as the Indenture Trustee deems satisfactory,
                 and the Indenture Trustee and/or its collateral agent may be
                 the purchaser for the ratable benefit of the Noteholders of
                 any or all of the Collateral so sold at a public sale and
                 thereafter hold the same absolutely free from any right or
                 claim of whatsoever kind, and the Indebtedness or any portion
                 of the Indebtedness may be applied as a credit against the
                 purchase price.

                          (ii)    Upon any such sale, the Indenture Trustee
                 shall have the right to deliver, assign and transfer to the
                 purchaser thereof the Collateral so sold.  Each purchaser at
                 any such sale shall hold the property sold absolutely free
                 from any claim or right of whatsoever kind by or on behalf of
                 the Company, including any equity or rights of redemption of
                 the Company, and the Company hereby specifically waives, to
                 the full extent permitted by applicable law, all rights of
                 redemption, stay or appraisal which it has or may have under
                 any rule or law or statute now existing or hereafter adopted.

                          (iii)   The Indenture Trustee shall give the Company
                 ten (10) business days' written notice (which the Company
                 agrees is reasonable notification within the meaning of
                 Section 9.504 of the UCC) of its intention to make any such
                 public or private sale.  Such notice, in case of public sale,
                 shall state the time and place fixed for such sale and, in
                 case of a private sale, shall state the date after which such
                 sale is to be made.

                          (iv)    Any such public sale shall be held at such
                 time or times within ordinary business hours and at such
                 places as the Indenture Trustee may fix in the notices of such
                 sale.  At any such sale the Collateral may be sold in one lot
                 as an entirety or in separate parcels, as the Indenture
                 Trustee may, in its sole discretion, determine.

                          (v)     The Indenture Trustee shall not be obligated
                 to make any sale of the Collateral if it shall determine not
                 to do so, regardless of the fact that notice of sale of the
                 Collateral may have been given.  The Indenture Trustee may,
                 without notice or publication, adjourn any public or private
                 sale or cause the same to be adjourned from time to time by
                 announcement at the time and place fixed for the sale, and
                 such sale may, without further notice, be made at any time or
                 place to which the same shall be so adjourned.

                          (vi)    In case of any sale of all or any part of the
                 Collateral on credit or for future delivery, the Collateral so
                 sold may be retained by the Indenture Trustee until the
                 selling price is paid by the purchaser thereof, but the
                 Indenture Trustee shall not incur





                                       13
   15
                 any liability in case of the failure of such purchaser to take
                 up and pay for the Collateral so sold and, in case of any such
                 failure, such Collateral may again be sold upon like notice.

                          (vii)   The Indenture Trustee, instead of exercising
                 the power of sale herein conferred upon it, may proceed by a
                 suit or suits at law or in equity to exercise its remedies
                 regarding the Collateral and sell the Collateral, or any
                 portion thereof, under a judgment or decree of a court or
                 courts of competent jurisdiction.

                          (viii)  The Company agrees that if any Event of
                 Default shall have occurred and be continuing, then the
                 Indenture Trustee shall have the right to take possession of
                 the Collateral, and for that purpose the Indenture Trustee
                 may, so far as the Company can give authority therefor, enter
                 upon any premises on which the Collateral may be situated and
                 remove the same therefrom with or without notice or process of
                 law.  The Company waives any and all rights that it may have
                 to a judicial hearing in advance of the enforcement of any of
                 the Indenture Trustee's rights hereunder, including, without
                 limitation, its right following an Event of Default to take
                 immediate possession of the Collateral and to exercise its
                 rights with respect thereto. To the extent that any of the
                 Obligations are to be paid or performed by a person other than
                 the Company, the Company waives and agrees not to assert any
                 rights or privileges which it may have under Section 9-112 of
                 the UCC.

                          (ix)    If under mandatory requirements of applicable
                 law, the Indenture Trustee shall be required to make
                 disposition of the Collateral within a period of time that
                 does not permit the giving of notice to the Company as
                 hereinbefore provided, the Indenture Trustee need give the
                 Company only such notice of disposition as shall be reasonably
                 practicable in view of such mandatory requirements of law.

                          (x)     The Indenture Trustee may instruct the
                 obligor or obligors on any agreement, instrument or other
                 obligation constituting the Collateral, including the obligors
                 under the Intercompany Notes, to make any payment or render
                 any performance required by the terms of such agreement,
                 instrument or obligation directly to the Indenture Trustee or
                 its designee.

                 (c)      The Indenture Trustee shall incur no liability as a
         result of the sale of the Collateral, or any part thereof, at any
         private sale other than for its own gross negligence, willful
         misconduct or bad faith.  The Company hereby waives, to the maximum
         extent permitted by applicable law, any claims against the Indenture
         Trustee and each Noteholder arising by reason of the fact that the
         price at which the Collateral may have been sold at such private sale
         was less than the price which might have been obtained at a public
         sale or was less than the aggregate amount of the Indebtedness, even
         if the Indenture Trustee accepts the first offer received and does not
         offer such Collateral to more than one offeree.

                 (d)      The Indenture Trustee shall not be obligated to
         pursue or exhaust its rights and remedies against any particular
         Collateral or other security for the Indebtedness before pursuing or
         enforcing its rights and remedies against any other Collateral or
         other security for the Indebtedness.





                                       14
   16
                 (e)      To the extent permitted by law, the Company hereby
         waives (i) any rights to require the Indenture Trustee to proceed
         first against any other Person, to exhaust its rights in the
         Collateral or other security for the Indebtedness or to pursue any
         other right that the Indenture Trustee might have, (ii) with respect
         to the Notes, presentment and demand for payment, protest, notice of
         protest and nonpayment, notice of dishonor, notice of the intention to
         accelerate and notice of acceleration (except as otherwise set forth
         in the Indenture), and (iii) all rights of marshalling in respect of
         any and all of the Collateral.

                 (f)      Without precluding any other methods of sale, the
         Company acknowledges that the sale of the Collateral shall have been
         made in a commercially reasonable manner if conducted in conformity
         with reasonable commercial practices of banks disposing of similar
         property.  The Indenture Trustee shall not be liable for any
         depreciation in the value of the Collateral.

                 (g)      The Company agrees that its obligation to deliver the
         Collateral is of the essence of this Agreement and that accordingly,
         upon application to a court of equity having jurisdiction, the
         Indenture Trustee shall be entitled to a decree requiring specific
         performance by the Company of such obligation.

                 (h)      Remedies of the Indenture Trustee are cumulative and
         the exercise of any one or more of the remedies provided herein shall
         not be construed as a waiver of any of the other remedies of the
         Indenture Trustee.

                 (i)      If an Event of Default shall have occurred and be
         continuing, the proceeds of any sale of or other realization upon all
         or any part of the Collateral and any other amounts held by the
         Indenture Trustee under this Agreement shall be applied by the
         Indenture Trustee as provided in the Indenture.

                 Any amounts remaining after such applications and the payment
in full of all Notes with respect to the Indebtedness shall be remitted to the
Company, its successors or assigns, or as a court of competent jurisdiction may
otherwise direct.

         Section 8. Registration Rights.

                 (a)      If the Indenture Trustee or the Noteholders shall
         determine to exercise the right to sell any or all of the Pledged
         Collateral pursuant to Section 7 hereof, and if in the opinion of
         counsel for the Indenture Trustee or the Noteholders it is necessary
         (or if in the opinion of the Indenture Trustee or the Noteholders it
         is advisable) to have the Pledged Collateral, or that portion thereof
         to be sold, registered under the provisions of the Securities Act of
         1933, as amended (the "Securities Act"), the Company will cause each
         issuing corporation to execute and deliver, and cause the directors
         and officers of each thereof to execute and deliver, all at the
         Company's expense, all such instruments and documents, and to do or
         cause to be done all such other acts and things as may be necessary
         or, in the opinion of the Indenture Trustee or the Noteholders,
         advisable to register the Pledged Collateral, or that portion thereof
         to be sold, under the provisions of the Securities Act and to use its
         best efforts to cause the registration statement relating thereto to
         become effective and to remain effective for a period of one year from
         the date of the first public offering of the Pledged Collateral, or
         that portion thereof to be sold, and to make all amendments or
         supplements thereto and/or to the related prospectus which, in the
         opinion of the Indenture Trustee or the Noteholders, are necessary or
         advisable, all in conformity with the requirements of the Securities
         Act and the rules and regulations of the Securities and





                                       15
   17
         Exchange Commission applicable thereto.  The Company agrees to use its
         best efforts to cause each such issuing corporation to comply with the
         provisions of the securities or "Blue Sky" laws of any jurisdiction
         which the Indenture Trustee or the Noteholder shall designate and to
         cause each such issuing corporation to make available to its security
         holders, as soon as practicable, an earnings statement (which need not
         be audited) which will satisfy the provisions of Section 11(a) of the
         Securities Act.

                 (b)      The Company recognizes that the Indenture Trustee or
         the Noteholders may be unable, or find it undesirable, to effect a
         public sale of any or all the Pledged Collateral by reason of certain
         prohibitions contained in the Securities Act and applicable state
         securities laws or otherwise, but may be compelled or desire to resort
         to one or more private sales thereof to a restricted group of
         purchasers who will be obliged to agree, among other things, to
         acquire such securities for their own account for investment and not
         with a view to the distribution or resale thereof in violation of the
         Securities Act.  The Company acknowledges and agrees that any such
         private sale may result in prices and other terms less favorable to
         the seller than if such sale were a public sale, but, notwithstanding
         such circumstances, such private sale shall be deemed to have been
         made in a commercially reasonable manner.  The Indenture Trustee and
         the Noteholders shall be under no obligation to delay a sale of any of
         the Pledged Collateral for the period of time necessary to permit the
         issuing corporation of such securities to register such securities for
         public sale under the Securities Act, or under applicable state
         securities laws, even if the issuing corporation would agree to do so.

                 (c)      The Company further agrees to use commercially
         reasonable efforts to do or cause to be done all such other acts and
         things as may be necessary to make such sale or sales of any portion
         or all of the Pledged Collateral valid and binding and in compliance
         with any and all applicable laws, regulations, orders, writs,
         injunctions, decrees or awards of any and all courts, arbitrators or
         governmental instrumentalities, domestic or foreign, having
         jurisdiction over any such sale or sales, all at the Company's
         expense.  The Company further agrees that a breach of any of the
         covenants contained in this Section 8 will cause irreparable injury to
         the Noteholders, that the Indenture Trustee and the Noteholders have
         no adequate remedy at law in respect of such breach and, as a
         consequence, agrees that each and every covenant contained in this
         Section 8 shall be specifically enforceable against the Company, and
         the Company hereby waives and agrees not to assert any defenses
         against an action for specific performance of such covenants except
         for a defense that no Event of Default has occurred under the
         Indenture.

                 (d)      In addition, the Company agrees to enter into, and to
         cause TransTexas to enter into, a Registration Rights Agreement, by
         and among the Company, TransTexas and the Indenture Trustee,
         satisfactory in both form and substance to both the Company and the
         Indenture Trustee, within 60 days of the date of this Agreement.

         Section 9. General Provisions.

                 (a)      Continuing Security Interest; Binding Effect.  This
         Agreement shall create a continuing security interest in the
         Collateral and shall (a) remain in full force and effect until
         termination of the obligations of the Indenture Trustee under the
         Indenture and the indefeasible payment in full thereafter of the
         Obligations; (b) be binding upon the Company and its successors and
         assigns; and (c) inure to the benefit of the Indenture Trustee for the
         benefit of the Noteholders and their respective successors,
         transferees and assigns.  Without limiting the generality of the
         foregoing clause (c), the Indenture Trustee may assign or otherwise
         transfer any





                                       16
   18
         of its rights under this Agreement to any other Person, and such
         Person shall thereupon become vested with all the benefits in respect
         thereof granted herein or otherwise to the Indenture Trustee.  Upon
         the termination of the obligations of the Indenture Trustee under the
         Indenture and the indefeasible payment in full thereafter of the
         Obligations, the Company shall be entitled to the return, upon its
         request and at its expense, of such of the Collateral as is in the
         Indenture Trustee's possession and as shall not have been sold or
         otherwise disposed of pursuant to the terms hereof.

                 (b)      Security Interest Absolute.  The lien and security
         interest created hereunder and the Company's obligations hereunder and
         the Indenture Trustee's rights hereunder shall not be released,
         diminished, impaired or adversely affected by the occurrence of any
         one or more of the following events:

                          (i)     The taking or accepting of any other security
                 or assurance for any or all of the Indebtedness;

                          (ii)    Any release, surrender, exchange,
                 subordination or loss of any security or assurance at any time
                 existing in connection with any or all of the Indebtedness;

                          (iii)   The modification of, amendment to, or waiver
                 of compliance with any terms of the Indenture, the Notes, the
                 TARC Loan Documents or the TransTexas Loan Documents;

                          (iv)    Any renewal, extension and/or rearrangement
                 of the payment of any or all of the Indebtedness or any
                 statement, indulgence, forbearance or compromise that may be
                 granted or given by the Indenture Trustee to the Company or
                 any other Person;

                          (v)     any neglect, delay, omission, failure or
                 refusal of the Indenture Trustee to take or prosecute any
                 action in connection with any agreement, document or other
                 instrument evidencing, securing or assuring the payment of any
                 or all of the Indebtedness;

                          (vi)    the illegality, invalidity or
                 unenforceability of all or any part of the Indenture, the
                 Notes, the TARC Loan Documents or the TransTexas Loan
                 Documents; or

                          (vii)   any other circumstance (other than payment in
                 full of the Obligations) that might otherwise constitute a
                 defense available to, or a discharge of, the Company or any
                 party to any document in respect of the Obligations.

                 (c)      Amendments.  This Agreement or any term hereof may be
         amended or changed only by an instrument in writing executed jointly
         by the Company and the Indenture Trustee and in accordance with
         Article IX of the Indenture.

                 (d)      Remedies Cumulative.  Each right, power and remedy
         herein specifically granted to the Indenture Trustee or otherwise
         available to it or now or hereafter existing in law or in equity shall
         be cumulative and concurrent, and shall be in addition to every other
         right, power and remedy herein specifically given or now or hereafter
         existing at law, in equity, or otherwise (including, without
         limitation, all rights, powers and remedies granted to a secured party
         under





                                       17
   19
         the UCC), and each such right, power and remedy, whether specifically
         granted herein or otherwise existing, may be exercised at any time and
         from time to time as often and in such order as may be deemed
         expedient by the Indenture Trustee in its sole and complete
         discretion.  The provisions of this Agreement may only be waived by an
         instrument in writing signed by the Indenture Trustee, and no failure
         on the part of the Indenture Trustee to exercise, and no delay in
         exercising, and no course of dealing with respect to, any such right,
         power or remedy, shall operate as a waiver thereof, nor shall any
         single or partial exercise of any such right, power or remedy preclude
         any other or further exercise thereof or the exercise of any other
         right.  No notice to or demand on the Company hereunder shall, of
         itself, entitle the Company to any other or further notice or demand
         in the same or similar circumstances.

                 (e)      Assignment.  Neither this Agreement nor any interest
         herein or in the Collateral, or any part thereof, may be assigned by
         the Company without the prior written consent of the Indenture
         Trustee, except as expressly permitted herein or in the Indenture or
         in the Disbursement Agreement.

                 (f)      Headings.  The descriptive headings of the several
         sections of this Agreement are inserted for convenience only and shall
         not control or affect the meaning or construction of any of the
         provisions hereof.

                 (g)      Severability.  Any provision of this Agreement that
         is prohibited or unenforceable in any jurisdiction shall, as to such
         jurisdiction, be ineffective to the extent of such prohibition or
         unenforceability without invalidating the remaining provisions hereof
         or affecting the validity of enforceability or such provision in any
         other jurisdiction.

                 (h)      Survival.  All representations and warranties
         contained herein, in the Indenture or made in writing by the Company
         in connection herewith or therewith, shall survive the execution and
         delivery of this Agreement, the Indenture and any documents executed
         in connection herewith or therewith.

                 (i)      Counterparts.  This Agreement may be executed in any
         number of counterparts and by different parties in separate
         counterparts, each of which when so executed and delivered shall be
         deemed to be an original, but all of which when taken together shall
         constitute one and the same instrument.  A complete set of
         counterparts shall be lodged with the Indenture Trustee.

                 (j)      Waiver.  To the extent permitted by applicable law
         the Company hereby waives promptness, diligence, notice of acceptance
         and any other notice with respect to any of the Indenture obligations
         and this Agreement and any requirement that the Indenture Trustee
         protect, secure, perfect or insure any security interest or any
         property subject thereto or exhaust any right or take any action
         against the Company or any other person or entity; provided however,
         that the Indenture Trustee shall in any event take such care in the
         handling of any Collateral in its possession as it takes with respect
         to its own property of a similar nature in its possession.

                 (k)      Notices.  Any notices or other communications
         required or permitted hereunder shall be in writing, and shall be
         sufficiently given if made by hand delivery, by telex, by facsimile or
         registered or certified mail, postage prepaid, return receipt
         requested, addressed as provided in Section 13.2 of the Indenture.
         Any party hereto may by notice to the other party designate such
         additional or different addresses as shall be furnished in writing by
         such party.  Any notice or communication to any party shall be deemed
         to have been given or made as of the





                                       18
   20
         date so delivered, if personally delivered; when answered back, if
         telexed; when receipt is acknowledged, if faxed; and five (5) calendar
         days after mailing, if sent by registered or certified mail (except
         that a notice of change of address shall not be deemed to have been
         given until actually received by the addressee).  The Company may give
         notice to the Noteholders at the addresses set forth for them in the
         register kept by the Registrar under the Indenture or may request that
         the Indenture Trustee notify the Noteholders at such address.

                 (l)      Conflicting Terms.  In the event of any conflict or
         inconsistency between the terms, covenants, conditions and provisions
         set forth in this Agreement and the terms, covenants, conditions and
         provisions set forth in the Indenture, the terms, covenants,
         conditions and provisions of the Indenture shall prevail.

                 (m)      Release.  The Collateral, in whole or in part, may be
         released in accordance with the Indenture.

                 (n)      Conflicts.  If any provision of the Indenture limits,
         qualifies, or conflicts with any similar provision of this Agreement,
         such provision of the Indenture shall control.

                 (o)      Governing Law.  THIS AGREEMENT SHALL BE GOVERNED BY
         AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK,
         WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW EXCEPT SECTION 5-1401
         OF THE NEW YORK GENERAL OBLIGATIONS LAW.  THE COMPANY HEREBY
         IRREVOCABLY SUBMITS TO THE JURISDICTION OF ANY NEW YORK STATE COURT
         SITTING IN THE BOROUGH OF MANHATTAN IN THE CITY OF NEW YORK OR ANY
         FEDERAL COURT SITTING IN THE BOROUGH OF MANHATTAN IN THE CITY OF NEW
         YORK IN RESPECT OF ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR
         RELATING TO THIS AGREEMENT, AND IRREVOCABLY ACCEPTS FOR ITSELF AND IN
         RESPECT OF ITS PROPERTY, GENERALLY AND UNCONDITIONALLY, JURISDICTION
         OF THE AFORESAID COURTS.  THE COMPANY IRREVOCABLY WAIVES, TO THE
         FULLEST EXTENT IT MAY EFFECTIVELY DO SO UNDER APPLICABLE LAW, TRIAL BY
         JURY AND ANY OBJECTION THAT IT MAY NOW OR HEREAFTER HAVE TO THE LAYING
         OF THE VENUE OF ANY SUCH SUIT, ACTION OR PROCEEDING BROUGHT IN ANY
         SUCH COURT AND ANY CLAIM THAT ANY SUCH SUIT, ACTION OR PROCEEDING
         BROUGHT IN ANY SUCH COURT HAS BEEN BROUGHT IN AN INCONVENIENT FORUM.
         THE COMPANY IRREVOCABLY CONSENTS, TO THE FULLEST EXTENT IT MAY
         EFFECTIVELY DO SO UNDER APPLICABLE LAW, TO THE SERVICE OF PROCESS OF
         ANY OF THE AFOREMENTIONED COURTS IN ANY SUCH ACTION OR PROCEEDING BY
         THE MAILING OF COPIES THEREOF BY REGISTERED OR CERTIFIED MAIL, POSTAGE
         PREPAID, TO THE COMPANY AT ITS SAID ADDRESS, SUCH SERVICE TO BECOME
         EFFECTIVE 30 DAYS AFTER SUCH MAILING.  NOTHING HEREIN SHALL AFFECT THE
         RIGHT OF THE INDENTURE TRUSTEE TO SERVE PROCESS IN ANY OTHER MANNER
         PERMITTED BY LAW OR TO COMMENCE LEGAL PROCEEDINGS OR OTHERWISE PROCEED
         AGAINST THE COMPANY IN ANY OTHER JURISDICTION.





                                       19
   21
                 IN WITNESS WHEREOF, the Company and the Indenture Trustee have
executed this Agreement as of the date first above written.


                                    TRANSAMERICAN ENERGY CORPORATION     
                                                                         
                                                                         
                                                                         
                                    By:                                  
                                        ---------------------------------
                                    Name:                                
                                           ------------------------------
                                    Title:                               
                                           ------------------------------
                                                                         
                                                                         
                                                                         
                                    FIRSTAR BANK OF MINNESOTA, N.A.,     
                                    as Indenture Trustee                 
                                                                         
                                                                         
                                                                         
                                    By:                                  
                                        ---------------------------------
                                    Name:                                
                                           ------------------------------
                                    Title:                               
                                           ------------------------------

   22



                                                                       EXHIBIT A



                             PERFECTION CERTIFICATE

                 The undersigned, Chief Financial Officer of TransAmerican
Energy Corporation, a Delaware corporation (the "Company"), hereby certify with
reference to the Security and Pledge Agreement dated as of June 13, 1997
between the Company and, as Indenture Trustee Firstar Bank of Minnesota, N.A.,
as (terms defined therein being used herein as therein defined), to the
Indenture Trustee as follows:

         Section 1. Names.

                 (a)      The exact corporate name of the Company, as it
         appears in its certificate of incorporation is as follows:

                          TransAmerican Energy Corporation

                 (b)      Set forth below is each other corporate name the
         Company has had since its organization, together with the date of the
         relevant change:

                          n/a

                 (c)      The Company has not changed its identity or corporate
         structure in any way within the past five years except:

                          n/a

                 (d)      The following is a list of all other names (including
         trade names or similar appellations) used by the Company or any of its
         divisions or other business units at any time during the past five
         years:

                          The TEC Group, Inc.

         Section 2. Current Locations.

                 (a)      The chief executive office of the Company is located
         at the following address:

                 Mailing Address                        County     State

                 1300 N. Sam Houston Parkway East       Harris     Texas
                 Houston, 77032


                 (b)      The following are all the places of business of the
         Company not identified above:

                 Mailing Address                        County     State
 
                 n/a





                                      A-1
   23
         Section 3. Prior Locations.  Set forth below is the information
required by subparagraphs (a) and (b) of Section 2 with respect to each
location or place of business maintained by the Company at any time during the
past five years:

                          n/a




         Section 4. UCC Filings.  A duly signed financing statement on Form
UCC-1 in substantially the form of Schedule 4(a) hereto has been duly filed in
the UCC filing office in each jurisdiction identified in Section 2 hereof.  The
Company will deliver a true copy of each such filing duly acknowledged by the
filing officer as soon as practicable after the date hereof.

         Section 5. Schedule of Filings.  Attached hereto as Schedule 5 is a
schedule setting forth filing information with respect to the filings described
in Section 4 above.

         Section 6. Filings Fees.  All filing fees and taxes payable in
connection with the filings described in Section 4 above have been paid.





                                      A-2
   24
                 IN WITNESS WHEREOF, the undersigned have hereunto set their
hands this ___ day of June, 1997 in the respective capacities indicated below
their signatures.





                                                  ----------------------------
                                                  Name:
                                                       -----------------------
                                                  Title:
                                                        ----------------------
                                                  





                                      A-3
   25
                                                                   SCHEDULE 2(b)

                              PLEDGED COLLATERAL





========================================================================================================================
                                                                                                           Percentage
                                                   Stock                                 Number                of
Stock                          Class of         Certificate              Par              of               Outstanding
Issuer                          Stock             No.(s)                Value            Shares              Shares
- ------                         --------         -----------             -----           -------            -----------
========================================================================================================================
                                                                                                 
TransAmerican Refining        Common Stock               4              $0.01           30,000,000               100%
Corporation
- ------------------------------------------------------------------------------------------------------------------------
TransTexas Gas Corporation    Common Stock              0043            $0.01            1,940,147              2.62%
- ------------------------------------------------------------------------------------------------------------------------
TransTexas Gas Corporation    Common Stock              0044            $0.01           38,059,853             51.43%
- ------------------------------------------------------------------------------------------------------------------------
TransTexas Gas Corporation    Common Stock              0045            $0.01           10,450,000             14.12%
========================================================================================================================






                                       1
   26
                                                                   SCHEDULE 4(a)


                           DESCRIPTION OF COLLATERAL

         1.      All of the Debtor's right, title and interest in, to and under
any and all of the following described property, assets and rights, in each
case, wherever located, whether now owned or hereafter acquired or arising, all
accessions and additions thereto, all substitutions and replacements therefor,
and all proceeds and products thereof and assigns all rights in and to all
collateral securing the following described property, assets and rights:

                 (a)      all equipment, machinery, chattels, tools, parts,
         machine tools, motor vehicles, furniture, fixtures and supplies of
         every nature, including, without limitation, vehicles, drilling rigs,
         workover rigs, fracture stimulation equipment, wellsite compressors,
         rolling stock and related equipment and other assets accounted for as
         equipment by the Debtor on its financial statements, all proceeds
         thereof, and all documents of title, books, records, ledger cards,
         files, correspondence, and computer files, tapes, disks and related
         data processing software that at any time evidence or contain
         information relating to the foregoing (any and all such property being
         the "Equipment");

                 (b)      all inventory in all of its forms, including without
         limitation, feedstocks, refined petroleum products, acquired line
         pipe, casing, drill pipe and other supplies accounted for as inventory
         by the Debtor on its financial statements (excluding any oil, natural
         gas, condensate and natural gas liquids), all proceeds thereof, and
         all documents of title, books, records, ledger cards, files,
         correspondence, and computer files, tapes, disks and related data
         processing software (any and all such property being "Inventory");

                 (c)      all personal and fixture property of every kind and
         nature including, without limitation, all furniture, fixtures, raw
         materials, goods, contract rights, rights to the payment of money
         (including, without limitation, all right title and interest in and to
         (a) that certain Loan Agreement dated as of June 13, 1997 by and
         between TransAmerican Refining Corporation ("TARC") and the Debtor;
         (b) that certain promissory note in the amount of $920,000,000
         executed by TARC in favor of the Debtor dated as of June 13, 1997; (c)
         that certain Loan Agreement dated as of June 13, 1997 by and between
         TransTexas Gas Corporation ("TransTexas") and the Debtor and (d) that
         certain promissory note in the amount of $450,000,000 executed by
         TransTexas in favor of the Debtor dated as of June 13, 1997),
         insurance refund claims and all other insurance claims and proceeds,
         tort claims, chattel paper, documents, instruments (including
         certificated securities), deposit accounts and all general intangibles
         including, without limitation, all uncertificated securities, tax
         refund claims, license fees, patents, patent applications, trademarks,
         trademark applications, trade names, copyrights, copyright
         applications, rights to sue and recover for past infringement of
         patents, trademarks and copyrights, computer programs, computer
         software, engineering drawings, service marks, customer lists,
         goodwill, and all licenses, permits, agreements of any kind or nature
         pursuant to which the Company possesses, uses or has authority to
         possess or use property (whether tangible or intangible) of others or
         others possess, use or have authority to possess or use property
         (whether tangible or intangible) of the Debtor, and all recorded data
         of any kind or nature, regardless of the medium of recording
         including, without limitation, all software, writings, plans,
         specifications and schematics (any and all such property being the
         "Personal Property"); and





                                       1
   27
                 (d)      any and all "accounts" as such term is defined in
         Article 9 of the Uniform Commercial Code as in effect in the State of
         New York (excluding all intercompany accounts), all products and
         proceeds thereof, and all books, records, ledger cards, files,
         correspondence, and computer files, tapes, disks or software that at
         any time evidence or contain information relating to the foregoing
         (any and all such property, the "Receivables" and together with the
         Equipment, Inventory and Personal Property, the "Company UCC
         Collateral").

         2.      All of the following described property, rights and interests,
in each case, wherever located, whether now owned or hereafter acquired or
arising, all accessions and additions thereto, all substitutions and
replacements therefor, and all proceeds and products thereof (collectively, the
"Pledged Collateral"):

                 (a)      all of the issued and outstanding shares of common
         stock identified on Schedule 2(b) attached hereto of TARC, TransTexas
         and any other subsidiary of the Company presently existing or
         hereafter created or acquired (the "Pledged Subsidiaries") therein set
         forth;

                 (b)      all other shares of common stock or other equity
         securities issued by the Pledged Subsidiaries now or hereafter owned
         or acquired by the Company in any manner, and the certificates
         representing such securities, and any present or future options,
         warrants or other rights to subscribe for or purchase any property
         described in Section (b)(i) or any notes, bonds, debentures or other
         evidences of indebtedness that (A) are at any time convertible,
         exchangeable or exercisable into capital stock or other equity
         securities of the Pledged Subsidiaries or (B) have or at any time
         could by their terms have voting rights with respect to any matter
         affecting the Pledged Subsidiaries and all securities, certificates
         and instruments representing or evidencing ownership of any of the
         property described in Section (b) hereof; provided, however, that in
         the event the Company acquires any outstanding Common Stock Purchase
         Warrants of TARC issued on February 23, 1995 (the "TARC Warrants")
         pursuant to a tender offer by the Company for such TARC Warrants, the
         Company shall promptly cancel such TARC Warrants or contribute such
         TARC Warrants to TARC for prompt cancellation, and in no event will
         such TARC Warrants be included in the definition of "Pledged
         Collateral"; and

                 (c)      all proceeds and products of the foregoing and
         distributions thereof or with respect thereto, including without
         limitation dividends, distributions, cash, instruments and other
         property or securities, now or hereafter at any time or from time to
         time received or receivable or otherwise distributed or distributable
         in respect of or in exchange for any or all of the foregoing.

         3.      The disbursement account (the "Disbursement Account")
maintained at Firstar Bank of Minnesota, N.A., more specifically described on
Schedule I attached hereto, owned by the Debtor and created by that certain
Disbursement Agreement by and among the Company, TARC, the disbursement agent
named therein and the construction supervisor named therein, as amended
pursuant to the terms thereof, and all investments, securities, financial
assets credited thereto and security entitlements with respect thereto, and all
certificates and instruments, if any, from time to time representing or
evidencing the Disbursement Account or any property credited thereto, whether
now owned by the Company or existing or hereafter acquired, created or arising
including the proceeds thereof (the "Assigned Collateral" and, together with
the Company UCC Collateral and the Pledged Collateral, the "Collateral").

Notwithstanding anything contained herein to the contrary, the stock of an
Accounts Receivable Subsidiary shall not constitute Collateral hereunder.





                                       2
   28
                                                                      SCHEDULE 5


                              SCHEDULE OF FILINGS




Debtor                    Filing Officer                    File Number
Date(1)
                                                      






- ---------------

(1)    Indicate lapse date, if other than fifth anniversary.

                                       1