1
 
                             LETTER OF TRANSMITTAL
 
                                  NEWCOR, INC.
 
                               OFFER TO EXCHANGE
 
               9 7/8% SERIES B SENIOR SUBORDINATED NOTES DUE 2008
                       FOR ANY AND ALL OF THE OUTSTANDING
                   9 7/8% SENIOR SUBORDINATED NOTES DUE 2008
 
            THE EXCHANGE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT
           5:00 P.M., NEW YORK CITY TIME, ON                  , 1998
                          UNLESS THE OFFER IS EXTENDED
 
                      U.S. BANK TRUST NATIONAL ASSOCIATION
                             (THE "EXCHANGE AGENT")
 

                                                        
By Registered, Certified, or             By Hand:                 By First Class Mail:
 Overnight Mail or Courier:
    U.S. BANK TRUST N.A.           U.S. BANK TRUST N.A.           U.S. BANK TRUST N.A.
  ATTN: SPECIALIZED FINANCE     4TH FLOOR BOND DROP WINDOW           P.O. BOX 64485
          SPFT0414                 180 EAST FIFTH STREET         ST. PAUL, MN 55164-9549
    180 EAST FIFTH STREET           ST. PAUL, MN 55101
     ST. PAUL, MN 55101

 
                                 By Facsimile:
                       (FOR ELIGIBLE INSTITUTIONS ONLY):
                                 (612) 244-1537
 
    Delivery of this instrument to an address other than as set forth above or
transmission of instructions via a facsimile number other than the ones listed
above will not constitute a valid delivery. The instructions accompanying this
Letter of Transmittal should be read carefully before this Letter of Transmittal
is completed.
 
    The undersigned hereby acknowledges receipt of the Prospectus dated
             , 1998 (the "Prospectus") of Newcor, Inc. (the "Issuer") and this
Letter of Transmittal, which together constitute the Issuer's offer (the
"Exchange Offer") to exchange $1,000 principal amount of its 9 7/8% Series B
Senior Subordinated Notes due 2008 (the "Exchange Notes"), which have been
registered under the Securities Act of 1933, as amended (the "Securities Act"),
pursuant to a Registration Statement of which the Prospectus is a part, for each
$1,000 principal amount of its outstanding 9 7/8% Senior Subordinated Notes due
2008 (the "Notes"), respectively. The term "Expiration Date" shall mean 5:00
p.m., New York City time, on              , 1998, unless the Issuer, in its
reasonable judgment, extend the Exchange Offer, in which case the term shall
mean the latest date and time to which the Exchange Offer is extended.
Capitalized terms used but not defined herein have the meaning given to them in
the Prospectus.
 
    YOUR BANK OR BROKER CAN ASSIST YOU IN COMPLETING THIS FORM. THE INSTRUCTIONS
INCLUDED WITH THIS LETTER OF TRANSMITTAL MUST BE FOLLOWED. QUESTIONS AND
REQUESTS FOR ASSISTANCE OR FOR ADDITIONAL COPIES OF THE PROSPECTUS AND THIS
LETTER OF TRANSMITTAL MAY BE DIRECTED TO THE EXCHANGE AGENT.
   2
 
    List below the Notes to which this Letter of Transmittal relates. If the
space indicated is inadequate, the Certificate or Registration Numbers and
Principal Amounts should be listed on a separately signed schedule affixed
hereto.
 

                                                                                    
=====================================================================================================================
                                        DESCRIPTION OF NOTES TENDERED HEREBY
- ---------------------------------------------------------------------------------------------------------------------
        NAME(S) AND ADDRESS(ES) OF               CERTIFICATE          AGGREGATE PRINCIPAL
           REGISTERED OWNER(S)                 OR REGISTRATION       AMOUNT REPRESENTED BY       PRINCIPAL AMOUNT
             (PLEASE FILL IN)                      NUMBERS*                  NOTES                  TENDERED**
- ---------------------------------------------------------------------------------------------------------------------
 
                                           --------------------------------------------------------------------------
 
                                           --------------------------------------------------------------------------
 
                                           --------------------------------------------------------------------------
 
                                           --------------------------------------------------------------------------
 
                                           --------------------------------------------------------------------------
                                                    TOTAL
- ---------------------------------------------------------------------------------------------------------------------
  * Need not be completed by book-entry Holders.
 ** Unless otherwise indicated, the Holder will be deemed to have tendered the full aggregate principal amount
    represented by such Notes. All tenders must be in integral multiples of $1,000.
- ---------------------------------------------------------------------------------------------------------------------

 
    This Letter of Transmittal is to be used if (i) certificates representing
Notes are to be physically delivered to the Exchange Agent herewith, (ii) tender
of Notes is to be made by book-entry transfer to an account maintained by the
Exchange Agent at The Depository Trust Company ("DTC"), pursuant to the
procedures set forth in "The Exchange Offer -- Book-Entry Transfer; ATOP" in the
Prospectus or (iii) tender of the Notes is to be made according to the
guaranteed delivery procedures described in the Prospectus under the caption
"The Exchange Offer -- Guaranteed Delivery Procedures." See Instruction 2.
Delivery of documents to a book-entry transfer facility does not constitute
delivery to the Exchange Agent.
 
    As used in this Letter of Transmittal, the term "Holder" with respect to the
Exchange Offer means any person in whose name Notes are registered on the books
of the Issuer or, with respect to interests in the Global Notes held by DTC, any
DTC participant listed in an official DTC proxy. The undersigned has completed,
executed and delivered this Letter of Transmittal to indicate the action the
undersigned desires to take with respect to the Exchange Offer. Holders who wish
to tender their Notes must complete this letter in its entirety.
 
    Holders of Notes that are tendering by book-entry transfer to the Exchange
Agent's account at DTC can execute the tender through the Book-Entry Transfer
Facility Automated Tender Offer Program ("ATOP"), for which the transaction will
be eligible. DTC participants that are accepting the Exchange Offer must
transmit their acceptances to DTC, which will verify the acceptance and execute
a book-entry delivery to the Exchange Agent's account at DTC. DTC will then send
an Agent's Message to the Exchange Agent for its acceptance. Each DTC
participant transmitting an acceptance of the Exchange Offer through the ATOP
procedures will be deemed to have agreed to be bound by the terms of this Letter
of Transmittal.
 
[ ]  CHECK HERE IF TENDERED NOTES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER
     MADE TO THE ACCOUNT MAINTAINED BY THE EXCHANGE AGENT WITH DTC AND COMPLETE
     THE FOLLOWING:
 
     NAME OF TENDERING INSTITUTION
 
     ACCOUNT NUMBER
 
     TRANSACTION CODE NUMBER
 
    Holders whose Notes are not immediately available or who cannot deliver
their Notes and all other documents required hereby to the Exchange Agent on or
prior to the Expiration Date must tender their Notes according to the guaranteed
delivery procedure set forth in the Prospectus under the caption "The Exchange
Offer -- Guaranteed Delivery Procedures." See Instruction 2.
 
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   3
 
[ ]  CHECK HERE IF TENDERED NOTES ARE BEING DELIVERED PURSUANT TO A NOTICE OF
     GUARANTEED DELIVERY AND COMPLETE THE FOLLOWING:
 
     NAME OF REGISTERED HOLDER(S)
 
     NAME OF ELIGIBLE INSTITUTION THAT GUARANTEED DELIVERY
 
     ---------------------------------------------------------------------------
 
     IF DELIVERY BY BOOK-ENTRY TRANSFER:
 
         ACCOUNT NUMBER
 
         TRANSACTION CODE NUMBER
 
[ ]  CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL
     COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS
     THERETO.
 
     NAME
 
     ADDRESS
 
                                        3
   4
 
                 PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY
 
     Ladies and Gentlemen:
 
     Upon the terms and subject to the conditions of the Exchange Offer, the
undersigned hereby tenders to the Issuer the principal amount of the Notes
indicated above. Subject to, and effective upon, the acceptance for exchange of
such Notes tendered hereby, the undersigned hereby exchanges, assigns and
transfers to, or upon the order, of, the Issuer all right, title and interest in
and to such Notes as are being tendered hereby, including all rights to accrued
and unpaid interest thereon as of the Expiration Date. The undersigned hereby
irrevocably constitutes and appoints the Exchange Agent the true and lawful
agent and attorney-in-fact of the undersigned (with full knowledge that said
Exchange Agent acts as the agent of the Issuer in connection with the Exchange
Offer) to cause the Notes to be assigned, transferred and exchanged. The
undersigned represents and warrants that it has full power and authority to
tender, exchange, assign and transfer the Notes and to acquire Exchange Notes
issuable upon the exchange of such tendered Notes, and that when the same are
accepted for exchange, the Issuer will acquire good and unencumbered title to
the tendered Notes, free and clear of all liens, restrictions, charges and
encumbrances and not subject to any adverse claim.
 
     The undersigned represents to the Issuer and each of the Subsidiary
Guarantors (as defined in the Prospectus) that (i) the Exchange Notes acquired
pursuant to the Exchange Offer are being obtained in the ordinary course of
business of the person receiving such Exchange Notes, whether or not such person
is the undersigned, and (ii) neither the undersigned nor any such other person
has an arrangement or understanding with any person to participate in the
distribution of such Exchange Notes. If the undersigned or the person receiving
the Exchange Notes covered hereby is a broker-dealer that is receiving the
Exchange Notes for its own account in exchange for Notes that were acquired as a
result of market-making activities or other trading activities, the undersigned
acknowledges that it or such other person will deliver a prospectus meeting the
requirements of the Securities Act in connection with any resale of such
Exchange Notes; however, by so acknowledging and by delivering a prospectus, the
undersigned will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act. The undersigned and any such other person
acknowledge that, if they are participating in the Exchange Offer for the
purpose of distributing the Exchange Notes, (i) they cannot rely on the position
of the staff of the Securities and Exchange Commission enunciated in Exxon
Capital Holdings Corporation (April 13, 1988), Morgan Stanley & Co., Inc. (June
5, 1991) or similar no-action letters and, in the absence of an exemption
therefrom, must comply with the registration and prospectus delivery
requirements of the Securities Act in connection with the resale transaction and
(ii) failure to comply with such requirements in such instance could result in
the undersigned or any such other person incurring liability under the
Securities Act for which such persons are not indemnified by the Issuer or any
Subsidiary Guarantor. If the undersigned or the person receiving the Exchange
Notes covered by this letter is an affiliate (as defined under Rule 405 of the
Securities Act) of the Issuer, the undersigned represents to the Issuer and the
Subsidiary Guarantors that the undersigned understands and acknowledges that
such Exchange Notes may not be offered for resale, resold or otherwise
transferred by the undersigned or such other person without registration under
the Securities Act or an exemption therefrom.
 
     The undersigned also warrants that it will, upon request, execute and
deliver any additional documents deemed by the Exchange Agent or the Issuer to
be necessary or desirable to complete the exchange, assignment and transfer of
tendered Notes or transfer ownership of such Notes on the account books
maintained by a book-entry transfer facility. The undersigned further agrees
that, except in the special situations described in the Prospectus, acceptance
of any tendered Notes by the Issuer and the issuance of Exchange Notes in
exchange therefor shall constitute performance in full by the Issuer and the
Subsidiary Guarantors of their obligations under the Registration Rights
Agreement and the Issuer and the Subsidiary Guarantors shall have no further
obligations or liabilities thereunder for the registration of the Notes or the
Exchange Notes.
 
     The Exchange Offer is subject to certain conditions set forth in the
Prospectus under the caption "The Exchange Offer -- Conditions." The undersigned
recognizes that as a result of these conditions (which may be waived, in whole
or in part, by the Issuer), as more particularly set forth in the Prospectus,
the Issuer may
 
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not be required to exchange any of the Notes tendered hereby and, in such event,
the Notes not exchanged will be returned to the undersigned at the address shown
below the signature of the undersigned.
 
     All authority herein conferred or agreed to be conferred shall survive the
death or incapacity of the undersigned and every obligation of the undersigned
hereunder shall be binding upon the heirs, personal representatives, successors
and assigns of the undersigned. Tendered Notes may be withdrawn at any time
prior to the Expiration Date.
 
     Unless otherwise indicated in the box entitled "Special Registration
Instructions" or the box entitled "Special Delivery Instructions" in this Letter
of Transmittal, certificates for all Exchange Notes delivered in exchange for
tendered Notes, and any Notes delivered herewith but not exchanged, will be
registered in the name of the undersigned and shall be delivered to the
undersigned at the address shown below the signature of the undersigned. If an
Exchange Note is to be issued to a person other than the person(s) signing this
Letter of Transmittal, or if the Exchange Note is to be mailed to someone other
than the person(s) signing this Letter of Transmittal or to the person(s)
signing this Letter of Transmittal at an address different than the address
shown on this Letter of Transmittal, the appropriate boxes of this Letter of
Transmittal should be completed. If Notes are surrendered by Holder(s) that have
completed either the box entitled "Special Registration Instructions" or the box
entitled "Special Delivery Instructions" in this Letter of Transmittal,
signature(s) on this Letter of Transmittal must be guaranteed by an Eligible
Institution (defined in Instruction 2).
 
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   6
 
                      SPECIAL REGISTRATION INSTRUCTIONS
 
      To be completed ONLY if the Exchange Notes are to be issued in
 the name of someone other than the undersigned.
 
 Name: 
       ------------------------------------------------------------------------
 
 Address: 
          ---------------------------------------------------------------------

 Book-Entry Transfer Facility Account:


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

 Employee Identification or Social Security Number:


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                            (Please print or type)
 
 
                        SPECIAL DELIVERY INSTRUCTIONS
 
     To be completed ONLY if the Exchange Notes are to be sent to someone other
 than the undersigned, or to the undersigned at an address other than that shown
 under "Description of Notes Tendered Hereby."
 
 Name: 
       ------------------------------------------------------------------------
 
 Address: 
          ---------------------------------------------------------------------

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



 ------------------------------------------------------------------------------
                            (Please print or type)
 

 
         REGISTERED HOLDER(S) OF NOTES OR DTC PARTICIPANT(S) SIGN HERE
               (In addition, complete Substitute Form W-9 below)
   X
    ---------------------------------------------------------------------------

   X
    ---------------------------------------------------------------------------
          (Signature(s) of Registered Holder(s) or DTC Participant(s))
 
        Must be signed by registered holder(s) or DTC participant(s) exactly
   as name(s) appear(s) on the Notes or on a security position listing as the
   owner of the Notes or by person(s) authorized to become registered
   holder(s) by properly completed bond powers transmitted herewith. If
   signature is by attorney-in-fact, trustee, executor, administrator,
   guardian, officer of a corporation or other person acting in a fiduciary
   capacity, please provide the following information. (Please print or
   type):

   Name and Capacity (full title):
                                  ---------------------------------------------
   Address (including zip code):
                                -----------------------------------------------

   ----------------------------------------------------------------------------
   Area Code and Telephone Number:
                                  ---------------------------------------------
   Taxpayer Identification or Social Security No.:
                                                  -----------------------------
   Dated: 
          ------------

                              SIGNATURE GUARANTEE
                       (If Required -- See Instruction 5)

   Authorized Signature:
                        -------------------------------------------------------
                          (Signature of Representative of Signature Guarantor)
 
   Name and Title:
                  -------------------------------------------------------------
   Name of Plan:
                ---------------------------------------------------------------
   Area Code and Telephone Number:
                                  ---------------------------------------------
                                             (Please print or type)
 
   Dated: 
          ------------
 
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   7
 
                           PAYOR'S NAME: NEWCOR, INC.
 
             THIS SUBSTITUTE FORM W-9 MUST BE COMPLETED AND SIGNED
 
     PLEASE PROVIDE YOUR SOCIAL SECURITY NUMBER OR OTHER TAXPAYER IDENTIFICATION
NUMBER ON THE FOLLOWING SUBSTITUTE FORM W-9 AND CERTIFY THEREIN THAT YOU ARE NOT
SUBJECT TO BACKUP WITHHOLDING.
 

                                                                             
- ------------------------------------------------------------------------------------------------------------------
                               PART 1--PLEASE PROVIDE YOUR TIN IN THE BOX AT       ------------------------------
  SUBSTITUTE                   RIGHT AND CERTIFY BY SIGNING AND DATING BELOW.          Social Security Number
  FORM W-9                     PART 2--Check the box if you are not subject to
                               backup withholding under the provisions of Section   OR
                               3406(A)(1)(C) of the Internal Revenue Code because     ---------------------------
                               (1) you are exempt from backup withholding, (2)          Employer Identification 
 DEPARTMENT OF                 you have not been notified that you are subject to                Number
 THE TREASURY                  backup withholding as a result of failure to
 INTERNAL REVENUE SERVICE      report all interest or dividends or (3) the
                               Internal Revenue Service has notified you that you
                               are no longer subject to backup withholding. [   ]
                             -------------------------------------------------------------------------------------
 
  PAYOR'S REQUEST FOR          CERTIFICATION: Under penalties of perjury, I                   PART 3--
  TAXPAYER IDENTIFICATION      certify that the information provided on this form         Awaiting TIN  [ ]
  NUMBER (TIN)                 is true, correct and complete.
                               Signature:
                                         ----------------------------------------
                               Date:
                                    ---------------------------------------------
- ------------------------------------------------------------------------------------------------------------------

 
NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP WITHHOLDING
      OF 31% OF ANY CASH PAYMENTS IN EXCESS OF $10.00 MADE TO YOU.
 
NOTE: YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX IN PART
      3 OF SUBSTITUTE FORM W-9.
 
               CERTIFICATE OF AWAITING TAX IDENTIFICATION NUMBER
 
  I certify under penalties of perjury that a taxpayer identification number has
not been issued to me, and either (a) I have mailed or delivered an application
to receive a taxpayer identification number to the appropriate Internal Revenue
Service Center or Social Security Administration Officer or (b) I intend to mail
or deliver such an application in the near future. I understand that if I do not
provide a taxpayer identification number within 60 days, 31% of all reportable
payments made to me thereafter will be withheld until I provide a number.
 
SIGNATURE                                               DATE 
          ---------------------------------------------      ------------------
 
                                        7
   8
 
                                  INSTRUCTIONS
 
                         FORMING PART OF THE TERMS AND
                        CONDITIONS OF THE EXCHANGE OFFER
 
1. DELIVERY OF THIS LETTER OF TRANSMITTAL AND CERTIFICATES.
 
     All physically delivered Notes or confirmation of any book-entry transfer
to the Exchange Agent's account at a book-entry transfer facility of Notes
tendered by book-entry transfer, as well as a properly completed and duly
executed copy of this Letter of Transmittal or facsimile thereof, and any other
documents required by this Letter of Transmittal, must be received by the
Exchange Agent at any of its addresses set forth herein on or prior to the
Expiration Date (as defined in the Prospectus). The method of delivery of this
Letter of Transmittal, the Notes and any other required documents is at the
election and risk of the Holder, and except as otherwise provided below, the
delivery will be deemed made only when actually received by the Exchange Agent.
If such delivery is by mail, it is suggested that registered mail with return
receipt requested, properly insured, be used.
 
     No alternative, conditional, irregular or contingent tenders will be
accepted. All tendering Holders, by execution of this Letter of Transmittal (or
facsimile thereof), shall waive any right to receive notice of the acceptance of
the Notes for exchange.
 
     Delivery to an address other than as set forth herein, or instructions via
a facsimile number other than the ones set forth herein, will not constitute a
valid delivery.
 
2. GUARANTEED DELIVERY PROCEDURES.
 
     Holders who wish to tender their Notes, but whose Notes are not immediately
available and thus cannot deliver their Notes, the Letter of Transmittal or any
other required documents to the Exchange Agent (or comply with the procedures
for book-entry transfer) prior to the Expiration Date, may effect a tender if:
 
     (a) the tender is made through a member firm of a registered national
         securities exchange or of the National Association of Securities
         Dealers, Inc., a commercial bank or trust company having an office or
         correspondent in the United States or an "eligible guarantor
         institution" within the meaning of Rule 17Ad-15 under the Exchange Act
         (an "Eligible Institution");
 
     (b) prior to the Expiration Date, the Exchange Agent receives from such
         Eligible Institution a properly completed and duly executed Notice of
         Guaranteed Delivery (by facsimile transmission, mail or hand delivery)
         setting forth the name and address of the Holder, the registration
         number(s) of such Notes and the principal amount of Notes tendered,
         stating that the tender is being made thereby and guaranteeing that,
         within three New York Stock Exchange trading days after the Expiration
         Date, the Letter of Transmittal (or facsimile thereof), together with
         the Notes (or a confirmation of book-entry transfer of such Notes into
         the Exchange Agent's account at DTC) and any other documents required
         by the Letter of Transmittal, will be deposited by the Eligible
         Institution with the Exchange Agent; and
 
     (c) such properly completed and executed Letter of Transmittal (or
         facsimile thereof), as well as all tendered Notes in proper form for
         transfer (or a confirmation of book-entry transfer of such Notes into
         the Exchange Agent's account at DTC) and all other documents required
         by the Letter of Transmittal, are received by the Exchange Agent within
         three New York Stock Exchange trading days after the Expiration Date.
 
     Upon request to the Exchange Agent, a Notice of Guaranteed Delivery will be
sent to Holders who wish to tender their Notes according to the guaranteed
delivery procedures set forth above. Any Holder who wishes to tender Notes
pursuant to the guaranteed delivery procedures described above must ensure that
the Exchange Agent receives the Notice of Guaranteed Delivery relating to such
Notes prior to the Expiration Date. Failure to complete the guaranteed delivery
procedures outlined above will not, of itself, affect the
 
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   9
 
validity or effect a revocation of any Letter of Transmittal form properly
completed and executed by a Holder who attempted to use the guaranteed delivery
procedures.
 
3. BENEFICIAL OWNER INSTRUCTIONS.
 
     Only a Holder of Notes (i.e., a person in whose name Notes are registered
on the books of the registrar or, with respect to interests in the Global Notes
held by DTC, a DTC participant listed in an official DTC proxy), or the legal
representative or attorney-in-fact of a Holder, may execute and deliver this
Letter of Transmittal. Any beneficial owner of Notes who wishes to accept the
Exchange Offer must arrange promptly for the appropriate Holder to execute and
deliver this Letter of Transmittal on his or her behalf through the execution
and delivery to the appropriate Holder of the Instructions to Registered Holder
and/or DTC Participant from Beneficial Owner form accompanying this Letter of
Transmittal.
 
4. PARTIAL TENDERS; WITHDRAWALS.
 
     If less than the entire principal amount of Notes evidenced by a submitted
certificate is tendered, the tendering Holder should fill in the principal
amount tendered in the column entitled "Principal Amount Tendered" of the box
entitled "Description of Notes Tendered Hereby." A newly issued Note for the
principal amount of Notes submitted but not tendered will be sent to such Holder
as soon as practicable after the Expiration Date. All Notes delivered to the
Exchange Agent will be deemed to have been tendered in full unless otherwise
indicated.
 
     Notes tendered pursuant to the Exchange Offer may be withdrawn at any time
prior to the Expiration Date, after which tenders of Notes are irrevocable. To
be effective, a written, telegraphic or facsimile transmission notice of
withdrawal must be timely received by the Exchange Agent. Any such notice of
withdrawal must (i) specify the name of the person having deposited the Notes to
be withdrawn (the "Depositor"), (ii) identify the Notes to be withdrawn
(including the registration number(s) and principal amount of such Notes, or, in
the case of Notes transferred by book-entry transfer, the name and number of the
account at DTC to be credited), (iii) be signed by the Holder in the same manner
as the original signature on this Letter of Transmittal (including any required
signature guarantees) or be accompanied by documents of transfer sufficient to
have the Trustee with respect to the Notes register the transfer of such Notes
into the name of the person withdrawing the tender and (iv) specify the name in
which any such Notes are to be registered, if different from that of the
Depositor. All questions as to the validity, form and eligibility (including
time of receipt) of such notices will be determined by the Issuer, whose
determination shall be final and binding on all parties. Any Notes so withdrawn
will be deemed not to have been validly tendered for purposes of the Exchange
Offer and no Exchange Notes will be issued with respect thereto unless the Notes
so withdrawn are validly retendered. Any Notes which have been tendered but
which are not accepted for exchange will be returned to the Holder thereof
without cost to such Holder as soon as practicable after withdrawal, rejection
of tender or termination of Exchange Offer.
 
5. SIGNATURE ON THIS LETTER OF TRANSMITTAL; WRITTEN INSTRUMENTS AND
   ENDORSEMENTS; GUARANTEE OF SIGNATURES.
 
     If this Letter of Transmittal is signed by the registered Holder(s) of the
Notes tendered hereby, the signature must correspond with the name(s) as written
on the face of the certificates without alteration or enlargement or any change
whatsoever. If this Letter of Transmittal is signed by a participant in DTC, the
signature must correspond with the name as it appears on the security position
listing as the owner of the Notes.
 
     If any of the Notes tendered hereby are owned of record by two or more
joint owners, all such owners must sign this Letter of Transmittal.
 
     If a number of Notes registered in different names are tendered, it will be
necessary to complete, sign and submit as many separate copies of this Letter of
Transmittal as there are different registrations of Notes.
 
                                        9
   10
 
     Signatures of this Letter of Transmittal or a notice of withdrawal, as the
case may be, must be guaranteed by an Eligible Institution unless the Notes
tendered hereby are tendered (i) by a registered Holder who has not completed
the box entitled "Special Registration Instructions" or "Special Delivery
Instructions" on the Letter of Transmittal or (ii) for the account of an
Eligible Institution.
 
     If this Letter of Transmittal is signed by the registered Holder or Holders
of Notes (which term, for the purposes described herein, shall include a
participant in DTC whose name appears on a security listing as the owner of the
Notes) listed and tendered hereby, no endorsements of the tendered Notes or
separate written instruments of transfer or exchange are required. In any other
case, the registered Holder (or acting Holder) must either properly endorse the
Notes or transmit properly completed bond powers with this Letter of Transmittal
(in either case, executed exactly as the name(s) of the registered Holder(s)
appear(s) on the Notes, and, with respect to a participant in DTC whose name
appears on a security position listing as the owner of Notes, exactly as the
name of the participant appears on such security position listing), with the
signature on the Notes or bond power guaranteed by an Eligible Institution
(except where the Notes are tendered for the account of an Eligible
Institution).
 
     If this Letter of Transmittal, any certificates or separate written
instruments of transfer or exchange are signed by trustees, executors,
administrators, guardians, attorneys-in-fact, officers of corporations or others
acting in a fiduciary or representative capacity, such persons should so
indicate when signing, and, unless waived by the Issuer, proper evidence
satisfactory to the Issuer of their authority so to act must be submitted.
 
6. SPECIAL REGISTRATION AND DELIVERY INSTRUCTIONS.
 
     Tendering Holders should indicate, in the applicable box, the name and
address (or account at DTC) in which the Exchange Notes or substitute Notes for
principal amounts not tendered or not accepted for exchange are to be issued (or
deposited), if different from the names and addresses or accounts of the person
signing this Letter of Transmittal. In the case of issuance in a different name,
the employer identification number or social security number of the person named
must also be indicated and the tendering Holder should complete the applicable
box.
 
     If no instructions are given, the Exchange Notes (and any Notes not
tendered or not accepted) will be issued in the name of and sent to the acting
Holder of the Notes or deposited at such Holder's account at DTC.
 
7. TRANSFER TAXES.
 
     The Issuer will pay all transfer taxes, if any, applicable to the transfer
and exchange of Notes to it or its order pursuant to the Exchange Offer. If a
transfer tax is imposed for any other reason other than the transfer and
exchange of Notes to the Issuer, or its order pursuant to the Exchange Offer,
the amount of any such transfer taxes (whether imposed on the registered Holder
or any other person) will be payable by the tendering Holder. If satisfactory
evidence of payment of such taxes or exception therefrom is not submitted
herewith, the amount of such transfer taxes will be collected from the tendering
Holder by the Exchange Agent.
 
     Except as provided in this Instruction 7, it will not be necessary for
transfer stamps to be affixed to the Notes listed in this Letter of Transmittal.
 
8. WAIVER OF CONDITIONS.
 
     The Issuer reserves the right, in its reasonable judgment, to waive, in
whole or in part, any of the conditions to the Exchange Offer set forth in the
Prospectus.
 
9. MUTILATED, LOST, STOLEN OR DESTROYED NOTES.
 
     Any Holder whose Notes have been mutilated, lost, stolen or destroyed
should contact the Exchange Agent at the address indicated above for further
instructions.
 
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   11
 
10. REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES.
 
     Questions relating to the procedure for tendering as well as requests for
additional copies of the Prospectus and this Letter of Transmittal, may be
directed to the Exchange Agent at the address and telephone number(s) set forth
above. In addition, all questions relating to the Exchange Offer, as well as
requests for assistance or additional copies of the Prospectus and this Letter
of Transmittal, may be directed to Newcor, Inc., Suite 240, 1825 S. Woodward,
Bloomfield Hills, Michigan 49302-0574, telephone (248_) 253-2400.
 
11. VALIDITY AND FORM.
 
     All questions as to the validity, form, eligibility (including time of
receipt), acceptance of tendered Notes and withdrawal of tendered Notes will be
determined by the Issuer in its sole discretion, which determination will be
final and binding. The Issuer reserves the absolute right to reject any and all
Notes not properly tendered or any Notes the Issuer's acceptance of which would,
in the opinion of counsel for the Issuer, be unlawful. The Issuer also reserves
the right, in its reasonable judgment, to waive any defects, irregularities or
conditions of tender as to particular Notes. The Issuer's interpretation of the
terms and conditions of the Exchange Offer (including the instructions in this
Letter of Transmittal) will be final and binding on all parties. Unless waived,
any defects or irregularities in connection with tenders of Notes must be cured
within such time as the Issuer shall determine. Although the Issuer intends to
notify Holders of defects or irregularities with respect to tenders of Notes,
neither the Issuer, the Exchange Agent nor any other person shall incur any
liability for failure to give such notification. Tenders of Notes will not be
deemed to have been made until such defects or irregularities have been cured or
waived. Any Notes received by the Exchange Agent that are not properly tendered
and as to which the defects or irregularities have not been cured or waived will
be returned by the Exchange Agent to the tendering Holder as soon as practicable
following the Expiration Date.
 
                                       11
   12
 
                           IMPORTANT TAX INFORMATION
 
     Under federal income tax law, a Holder tendering Notes is required to
provide the Exchange Agent with such Holder's correct TIN on Substitute Form W-9
above. If such Holder is an individual, the TIN is the Holder's social security
number. The Certificate of Awaiting Taxpayer Identification Number should be
completed if the tendering Holder has not been issued a TIN and has applied for
a number or intends to apply for a number in the near future. If the Exchange
Agent is not provided with the correct TIN, the Holder may be subject to a $50
penalty imposed by the Internal Revenue Service. In addition, payments that are
made to such Holder may be subject to backup withholding.
 
     Certain Holders (including, among others, all domestic corporations and
certain foreign individuals and foreign entities) are not subject to these
backup withholding and reporting requirements. Such a Holder, who satisfies one
or more of the conditions set forth in Part 2 of the Substitute Form W-9, should
execute the certification following such Part 2. In order for a foreign Holder
to qualify as an exempt recipient, that Holder must submit to the Exchange Agent
a properly completed Internal Revenue Service Form W-8, signed under penalties
of perjury, attesting to that Holder's exempt status. Such forms can be obtained
from the Exchange Agent.
 
     If backup withholding applies, the Exchange Agent is required to withhold
31% of any amounts otherwise payable to the Holder. Backup withholding is not an
additional tax. Rather, the tax liability of persons subject to backup
withholding will be reduced by the amount of tax withheld. If withholding
results in an overpayment of taxes, a refund may be obtained from the Internal
Revenue Service.
 
PURPOSE OF SUBSTITUTE FORM W-9
 
     To prevent backup withholding on payments that are made to a Holder, the
Holder is required to notify the Exchange Agent of his or her correct TIN by
completing the form herein certifying that the TIN provided on Substitute Form
W-9 is correct (or that such Holder is awaiting a TIN) and that (i) each Holder
is exempt, (ii) such Holder has not been notified by the Internal Revenue
Service that he or she is subject to backup withholding as a result of failure
to report all interest or dividends or (iii) the Internal Revenue Service has
notified such Holder that he or she is no longer subject to backup withholding.
 
WHAT NUMBER TO GIVE THE EXCHANGE AGENT
 
     Each Holder is required to give the Exchange Agent the social security
number or employer identification number of the record Holder(s) of the Notes.
If Notes are in more than one name or are not in the name of the actual Holder,
consult the instructions on Internal Revenue Service Form W-9, which may be
obtained from the Exchange Agent, for additional guidance on which number to
report.
 
CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER
 
     If the tendering Holder has not been issued a TIN and has applied for a
number or intends to apply for a number in the near future, write "Applied For"
in the space for the TIN on Substitute Form W-9, sign and date the form and the
Certificate of Awaiting Taxpayer Identification Number and return them to the
Exchange Agent. If such certificate is completed and the Exchange Agent is not
provided with the TIN within 60 days, the Exchange Agent will withhold 31% of
all payments made thereafter until a TIN is provided to the Exchange Agent.
 
     IMPORTANT: THIS LETTER OF TRANSMITTAL OR A FACSIMILE THEREOF (TOGETHER WITH
NOTES OR CONFIRMATION OF BOOK-ENTRY TRANSFER AND ALL OTHER REQUIRED DOCUMENTS)
OR A NOTICE OF GUARANTEED DELIVERY MUST BE RECEIVED BY THE EXCHANGE AGENT ON OR
PRIOR TO THE EXPIRATION DATE.
 
                                       12
   13
 
                                  INSTRUCTIONS
 
                          TO REGISTERED HOLDER AND/OR
 
                     DTC PARTICIPANT FROM BENEFICIAL OWNER
 
                                       OF
 
                                  NEWCOR, INC.
 
                   9 7/8% SENIOR SUBORDINATED NOTES DUE 2008
 
To Registered Holder and/or Participant in DTC.
 
     The undersigned hereby acknowledges receipt of the Prospectus, dated
            , 1998 (the "Prospectus") of Newcor, Inc. (the "Issuer"), and the
accompanying Letter of Transmittal (the "Letter of Transmittal"), that together
constitute the Issuer's offer (the "Exchange Offer"). Capitalized terms used but
not defined herein have the meanings ascribed to them in the Prospectus.
 
     This will instruct you, the registered holder and/or DTC participant, as to
action to be taken by you relating to the Exchange Offer with respect to the
9 7/8% Senior Subordinated Notes due 2008 (the "Notes") held by you for the
account of the undersigned.
 
     The aggregate face amount of the Notes held by you for the account of the
undersigned is (fill in amount):
 
     $       of the 9 7/8% Senior Subordinated Notes due 2008
 
     With respect to the Exchange Offer, the undersigned hereby instructs you
(CHECK APPROPRIATE BOX):
 
     [ ] TO TENDER the following Notes held by you for the account of the
undersigned (INSERT PRINCIPAL AMOUNT OF NOTES TO BE TENDERED, IF ANY):
$
 
     [ ] NOT TO TENDER any Notes held by you for the account of the undersigned.
 
     If the undersigned instructs you to tender the Notes held by you for the
account of the undersigned, it is understood that you are: (a) to make, on
behalf of the undersigned (and the undersigned, by its signature below, hereby
makes to you), the representations and warranties contained in the Latter of
Transmittal that are to be made with respect to the undersigned as a beneficial
owner, including but not limited to the representations that (i) the
undersigned's principal residence is in the state of (FILL IN THE NAME OF THE
STATE)                     , (ii) the undersigned is acquiring the Exchange
Notes in the ordinary course of business of the undersigned, (iii) the
undersigned is not participating, does not participate, and has no arrangement
or understanding with any person to participate in the distribution of the
Exchange Notes, (iv) the undersigned acknowledges that any person participating
in the Exchange Offer for the purpose of distributing the Exchange Notes must
comply with the registration and prospectus delivery requirements of the
Securities Act of 1933, as amended (the "Act"), in connection with a secondary
resale transaction of the Exchange Notes acquired by such person and cannot rely
on the position of the Staff of the Securities and Exchange Commission set forth
in no-action letters that are discussed in the section of the Prospectus
entitled "The Exchange Offer -- Resale of Exchange Notes," and (v) the
undersigned is not an "affiliate," as defined in Rule 405 under the Act, of the
Issuer; (b) to agree, on behalf of the undersigned, as set forth in the Letter
of Transmittal; and (c) to take such other actions as necessary under the
Prospectus or the Letter of Transmittal to effect the valid tender of such
Notes.
 
     [ ] Check this box if the beneficial owner of the Notes is a broker-dealer
and such broker-dealer acquired the Notes for its own account as a result of
market-making activities or other trading activities.
   14
 
                                   SIGN HERE
 
Name of beneficial owner(s):
                            ---------------------------------------------------
Signature(s):
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Name (please print):
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Address:
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Telephone number:
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Taxpayer Identification or Social Security Number:
                                                  -----------------------------

Date:
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