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                                                                     EXHIBIT 4.5





                           TRANSTEXAS GAS CORPORATION

                         SECURITY AND PLEDGE AGREEMENT

                                       by

                           TRANSTEXAS GAS CORPORATION

                                  in favor of

                        TRANSAMERICAN ENERGY CORPORATION





                           Dated as of June 13, 1997
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                           TRANSTEXAS GAS CORPORATION
                         SECURITY AND PLEDGE AGREEMENT

                 This Security and Pledge Agreement (this "Agreement") is made
and entered into as of June 13, 1997 by TransTexas Gas Corporation, a Delaware
corporation (the "Company"), in favor of TransAmerican Energy Corporation (the
"Lender").

                                    RECITALS

                 WHEREAS, the Company has entered into that certain Loan
Agreement dated as of June 13, 1997 (the "TransTexas Intercompany Loan
Agreement") executed by the Company in favor of the Lender; and

                 WHEREAS, the Company's 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 executed by the Company in favor of the Lender; and

                 WHEREAS, the obligations of the Company under the TransTexas
Intercompany Note and the TransTexas Intercompany Loan Agreement are secured by
(i) that certain Mortgage, Deed of Trust, Assignment of Production, Security
Agreement and Financing Statement dated as of June 13, 1997 (the "TransTexas
Alabama Mortgage"), (ii) that certain Mortgage, Deed of Trust, Assignment of
Production, Security Agreement and Financing Statement dated as of June 13,
1997 (the "TransTexas Texas Mortgage"), (iii) that certain Mortgage, Deed of
Trust, Assignment of Production, Security Agreement and Financing Statement
dated as of June 13, 1997 (the "TransTexas Mississippi Mortgage"), (iv) that
certain Mortgage, Deed of Trust, Assignment of Production, Security Agreement
and Financing Statement dated as of June 13, 1997 (the "TransTexas North Dakota
Mortgage") and (v) 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 Loan Agreement, the
TransTexas Intercompany Note, 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 obligations of the Company under the TransTexas Intercompany Loan
Agreement, 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
Lender 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 TransTexas
         Intercompany Loan Agreement, 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):
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                 "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, the Lender, the disbursement agent named therein,
         or its successor, and the construction supervisor named therein, as
         amended pursuant to the terms thereof.

                 "Equipment" shall mean and include all now owned or hereafter
         acquired Vehicles, drilling rigs, workover rigs, fracture stimulation
         equipment, well site compressors, rolling stock and related equipment
         and other assets accounted for as equipment in 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; provided,
         however, that "Equipment" shall not include any assets constituting
         part of a natural gas pipeline or the compression or dehydration
         equipment used in the operation of any such pipeline.

                 "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
                 Lender under the TransTexas Intercompany Loan Agreement and/or
                 under or in connection with this Agreement, all reasonable
                 costs and out-of-pocket expenses (excluding expenses
                 representing administrative overhead) at any time and from
                 time to time incurred by the Lender 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 Lender in
                 connection therewith), and all indemnities at any time and
                 from time to time payable hereunder to the Lender, and

                          (ii)    all principal, premium and accrued interest
                 owing on the TransTexas Intercompany Note, and

                          (iii)   all other amounts payable by the Company
                 under the TransTexas Intercompany Loan Agreement.





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                 "Inventory" shall mean and include now owned or hereafter
         acquired drill casing, drill pipe and other supplies accounted for as
         inventory by the Company on its financial statements (excluding
         Hydrocarbons), 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.

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

                 "Receivables" shall mean and include, any and all now owned or
         hereafter acquired "accounts" as such term is defined in Article 9 of
         the Uniform Commercial Code in the State of New York, 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.

                 "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 Lender, 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 Lender 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:

                          (i)     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, 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





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                 the "Company UCC Collateral"); provided, however, that nothing
                 herein shall be construed to include within and hereby is
                 expressly excluded from, the Company UCC Collateral, any now
                 owned or hereafter acquired Equipment, Inventory or
                 Receivables.

                 (b)      The Company also pledges to the Lender, and grants to
         the Lender 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
                 any subsidiary of the Company presently existing or hereafter
                 created or acquired (the "Pledged Subsidiaries") therein set
                 forth;

                          (ii)    all other shares of common stock or other
                 equity securities now or hereafter 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)(i) 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; 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 Lender and
         grants to the Lender 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 Lender
         or such other Person that the Lender 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 Lender 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





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         pledged by it hereunder, the Company shall, subject to Permitted
         Liens, forthwith endorse, assign and deliver the same to the Lender,
         accompanied by such instruments of transfer or assignment duly
         executed in blank as the Lender 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 Lender or one or more nominees of the Lender with
         the issuer of such securities or other appropriate book-entry facility
         or financial intermediary, with the Lender having at all times the
         right to obtain definitive certificates (in the Lender's name or in
         the name of one or more nominees of the Lender) where the issuer
         customarily or otherwise issues certificates, all to be held as
         Collateral hereunder.  The Company hereby acknowledges that the Lender
         may, in its discretion, appoint one or more financial institutions to
         act as the Lender's agent in holding in custodial accounts instruments
         or other financial assets, including securities, in which the Lender
         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 Lender under the
         TransTexas Intercompany Note, 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 TransTexas Intercompany Loan Agreement in
         each case whether for principal, interest, prepayment premium, taxes,
         costs, losses, compensation, reimbursements, fees, expenses or any
         other amount payable to the Lender 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 any Unrestricted Subsidiary shall not
         constitute Collateral hereunder.

         Section 3.       Representations and Warranties.  The Company
represents and warrants, as of the date hereof, to the Lender 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 Lender or its designated agent is and
         will continue to be located only in the States of Texas, Louisiana,
         Alabama, Mississippi and North Dakota.

                 (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
         TransTexas Intercompany Loan Agreement.  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





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         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.

                 (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 Lender or its designated agent 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 Schedule
         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 Lender
         the rights of the Lender 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





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         securities laws governing the sale of "restricted stock" or "control
         stock," with respect to the foreclosure, transfer or disposition
         thereof by the Lender.

         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
Lender that:

                 (a)      Except as permitted by the TransTexas Intercompany
         Loan Agreement 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 Lender.

                 (b)      The Company shall deliver to the Lender 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).  Any and all Pledged
         Collateral delivered to the Lender or its designated agent shall be
         accompanied by undated duly executed powers in blank and by such other
         instruments of transfer or documents as the Lender may reasonably
         request.  The Lender 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 Lender.

                 (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 Lender 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 Lender 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 Lender 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 Lender and its counsel) as
         the Lender 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 Lender (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, assignement, mortgage,
         hypothecation or transfer of





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         the Collateral except as permitted hereunder or under the TransTexas
         Intercompany Loan Agreement.

                 (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.

                 (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 Lender, 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 Lender pursuant to
         Section 2, will be kept at those locations listed on the Perfection
         Certificate delivered to the Lender 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 Lender.

                 (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 Lender, or its designee, may inspect the
         Collateral at any reasonable time, wherever located.

                 (i)      The Lender, 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 Lender and its representatives may examine the
         same, make abstracts therefrom and make photocopies thereof, and the
         Company agrees to render to the Lender, at the Company's cost and
         expense, such clerical and other assistance as may be reasonably
         requested by the Lender 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 Lender or its designated agent
         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 Lender in negotiable form, and all certificates or instruments
         evidencing such securities shall be delivered to the Lender 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 Lender with any
         necessary powers.





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         Section 5.       Powers of the Secured Party.

                 (a)      The Company hereby irrevocably designates and
         appoints the Lender 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 intended
         to be created hereunder, that the Lender 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
         Lender, upon the occurrence and during the continuation of any Event
         of Default, at the expense of the Company, either in the Lender'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 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 Lender); and

                          (iii)   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 Lender 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 Lender 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 Lender 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 Lender to
         do so shall not impair the validity or enforceability of this
         Agreement.  The Lender 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
         Lender's rights in or to, any of the Collateral.





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                 (e)      In its discretion, the Lender 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 Lender on demand for any and all
         reasonable expenditures so made with interest on unpaid amounts at the
         maximum rate permitted by law.  The Lender 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 Lender 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 Lender of any payment relating to
         any of the Collateral, nor shall the Lender 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 Lender 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 Lender or to which
         the Lender 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 Lender, unless the Lender's actions are taken or omitted
         to be taken with gross negligence or bad faith or constitute willful
         misconduct.  The Lender'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 Lender deals with similar
         property for its own account.

                 (g)      If an Event of Default has occurred and is
         continuing, the Lender 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 Lender 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 Lender 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 Lender, 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 Lender in any chattel paper, general
         intangible or instrument and that payment thereof is to be made
         directly to the Lender or to any financial institution designated by
         the Lender as the Lender's agent therefor, and the Lender 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 Lender without commingling the same with other funds of the
         Company and shall turn the same over to the Lender in the identical
         form received, together with any necessary endorsements or
         assignments.  The Lender shall apply the proceeds of collection of
         chattel paper, general intangibles and instruments received by the
         Lender to the Indebtedness, such proceeds to be immediately entered
         after final payment in cash of the items giving rise to them.





                                       10
   12
         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 Lender, 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 Lender 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 Lender, 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 Lender
         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 Lender 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
         Lender shall have no duty to exercise any of the aforesaid rights,
         privileges or options and the Lender shall not be responsible for any
         failure to do so or delay in so doing.





                                       11
   13
         Section 7.       Default.

                 (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 TransTexas Intercompany Note is
         accelerated under the provisions of the TransTexas Intercompany Loan
         Agreement, in addition to any other rights and remedies that may be
         available to the Lender under the UCC or the TransTexas Intercompany
         Loan Agreement or under Section 5(a) or 5(b) of this Agreement or
         otherwise under this Agreement or at law, the Lender shall also have
         the following rights and powers:

                          (i)     The Lender 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 Lender deems satisfactory, and the Lender
                 and/or its collateral agent may be the purchaser of any or all
                 of the Collateral so sold 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 Lender 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 Lender 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 Lender 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 Lender may, in its
                 sole discretion, determine.

                          (v)     The Lender 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 Lender 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 Lender until the selling price is
                 paid by the purchaser thereof, but the Lender shall not incur
                 any liability in case





                                       12
   14
                 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 Lender, 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 Lender
                 shall have the right to take possession of the Collateral, and
                 for that purpose the Lender 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 Lender'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 Lender 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
                 Lender need give the Company only such notice of disposition
                 as shall be reasonably practicable in view of such mandatory
                 requirements of law.

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

                 (c)      The Lender 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 Lender 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 Lender accepts the first offer received and
         does not offer such Collateral to more than one offeree.

                 (d)      The Lender 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.

                 (e)      To the extent permitted by law, the Company hereby
         waives (i) any rights to require the Lender 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
         Lender might have, (ii) with respect to the TransTexas Intercompany
         Note, presentment and demand for payment, protest, notice of protest
         and nonpayment, notice of dishonor, notice of the intention to
         accelerate





                                       13
   15
         and notice of acceleration (except as otherwise set forth in the
         TransTexas Intercompany Loan Agreement), 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 Lender 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 Lender
         shall be entitled to a decree requiring specific performance by the
         Company of such obligation.

                 (h)      Remedies of the Lender 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 Lender.

                 (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 Lender
         under this Agreement shall be applied by the Lender as provided in the
         Indenture.

                 Any amounts remaining after such applications and the payment
in full of the TransTexas Intercompany Note 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 Lender 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 Lender it is
         necessary (or if in the opinion of the Lender 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
         Lender, 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 Lender, are necessary or advisable, all
         in conformity with the requirements of the Securities Act and the
         rules and regulations of the Securities and 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 Lender
         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.





                                       14
   16
                 (b)      The Company recognizes that the Lender 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 Lender 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 Lender, that the Lender has 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.

         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 Company under the TransTexas
         Intercompany Loan Agreement 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 Lender and
         its successors, transferees and assigns.  Without limiting the
         generality of the foregoing clause (c), the Lender may assign or
         otherwise transfer any 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 Lender.
         Upon the termination of the obligations of the Lender 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
         Lender'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 Lender's rights hereunder shall not be released, diminished,
         impaired or adversely affected by the occurrence of any one or more of
         the following events:





                                       15
   17
                          (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 TransTexas Intercompany
                 Loan Agreement or the TransTexas Intercompany Note;

                          (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 Lender to the Company or any other
                 Person;

                          (v)     any neglect, delay, omission, failure or
                 refusal of the Lender 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 TransTexas
                 Intercompany Loan Agreement or the TransTexas Intercompany
                 Note; 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 Lender and in accordance with Article IX of the
         Indenture.

                 (d)      Remedies Cumulative.  Each right, power and remedy
         herein specifically granted to the Lender 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 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 Lender in its sole and complete discretion.  The provisions of
         this Agreement may only be waived by an instrument in writing signed
         by the Lender, and no failure on the part of the Lender 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 Lender, except as
         expressly permitted herein or in the Indenture or in the Disbursement
         Agreement.  The Company hereby acknowledges and consents to the
         collateral assignment by the





                                       16
   18
         Lender of this Agreement and the Lender's interest in the Collateral
         to the Indenture Trustee, as defined in the TARC Intercompany Loan
         Agreement.  The Company also agrees that, in the case of an Event of
         Default, the Indenture Trustee may exercise any rights and remedies of
         the Lender under this Agreement, and any reference to the "Lender"
         hereunder shall also include the Indenture Trustee.

                 (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 Lender.

                 (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 Lender 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
         Lender 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 9.3 of the TransTexas
         Intercompany Loan Agreement.  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 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).

                 (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.





                                       17
   19
                 (m)      Release.  The Collateral, in whole or in part, may be
         released in accordance with the TransTexas Intercompany Loan Agreement
         and the Indenture.

                 (n)      Conflicts.  If any provision of the TransTexas
         Intercompany Loan Agreement limits, qualifies, or conflicts with any
         similar provision of this Agreement, such provision of the TransTexas
         Intercompany Loan Agreement 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 LENDER 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.





                                       18
   20
                 IN WITNESS WHEREOF, the Company and the Lender have executed
this Agreement as of the date first above written.


                                            TRANSTEXAS GAS CORPORATION          
                                                                                
                                                                                
                                                                                
                                            By:                                 
                                                   -------------------------    
                                            Name:                               
                                                   -------------------------    
                                            Title:                              
                                                   -------------------------    
                                                                                

                                            TRANSAMERICAN ENERGY CORPORATION,
                                            as Lender



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



                                            By:                                 
                                                   -------------------------    
                                            Name:                               
                                                   -------------------------    
                                            Title:                              
                                                   -------------------------    
                                                                                
   21
                                                                       EXHIBIT A

                             PERFECTION CERTIFICATE

                 The undersigned, Chief Financial Officer of TransTexas Gas
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 TransAmerican Energy Corporation, as Lender (terms
defined therein being used herein as therein defined), to the Lender as
follows:

         Section 1.       Names.

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

                          TransTexas Gas 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:

                          Southwest Texas Services          Diamond Services
                          Southwest Texas Drilling          Diamond Frac
                          Southwest Petro American

         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






                                      A-1
   22
                 (b)      The following are all the places of business of the
         Company not identified above:



                 Mailing Address                   County                    State
                 ---------------                   ------                    -----
                                                                       
                                                                             Alabama
                                                                             Louisiana
                                                                             Mississippi
                                                                             North Dakota


         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:



                 Mailing Address                           County                    State
                 ---------------                           ------                    -----
                                                                               
                 363 N. Sam Houston Parkway East           Harris                    Texas
                 Suite 1900
                 Houston, 77060

                 140 Cypress Station Drive                 Harris                    Texas
                 Houston, 77090



         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
   23
                 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
   24
                                                                   SCHEDULE 2(b)

                               PLEDGED COLLATERAL




=====================================================================================================================
                                                                                                           Percentage
                                                   Stock                                 Number                of
Stock                         Class of          Certificate              Par               of             Outstanding
Issuer                          Stock             No.(s)                Value            Shares              Shares
=====================================================================================================================
                                                                                           
TransTexas Drilling           Common            1                      $0.01            1,000             100%
Services, Inc.
=====================================================================================================================






                                       1
   25
                                                                   SCHEDULE 4(a)


                           DESCRIPTION OF COLLATERAL


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:

                          (i)     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, 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 Debtor
                 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 "UCC Collateral"); provided, however, that nothing herein
                 shall be construed to include within, and there is expressly
                 excluded from, the Company UCC Collateral, any now owned or
                 hereafter acquired equipment, inventory or receivables ;

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

                          (iii)   all other shares of common stock or other
                 equity securities now or hereafter acquired by the Debtor 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 Section 2(b)(i) or any
                 notes, bonds, debentures or other evidences of indebtedness
                 now or hereafter owned or acquired by the Debtor 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 Section 2(b)
                 hereof;

                          (iv)    all proceeds and products of the foregoing
                 and distributions thereof or with respect thereto, including
                 without limitation dividends, distributions, cash,





                                       1
   26
                 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; and

                          (v)     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 Debtor, the Secured Party, 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 Debtor or
                 existing or hereafter acquired, created or arising including
                 the proceeds thereof (the "Assigned Collateral" and, together
                 with the UCC Collateral and the Pledged Collateral, the
                 "Collateral").

Notwithstanding anything contained herein to the contrary, the stock of any
Unrestricted Subsidiary shall not constitute Collateral hereunder.





                                       2
   27
                                                                      SCHEDULE 5


                              SCHEDULE OF FILINGS



Debtor                    Filing Officer                    File Number                       Date (1)
- ------                    --------------                    -----------                       ---- 
                                                                                     







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

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

                                      1