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<S>                 <C>              <C>             <C>
[COMERICA LOGO]     MASTER REVOLVING NOTE
                    VARIABLE RATE-DEMAND - Optional Advances (Business and Commercial Loans Only)

AMOUNT               NOTE DATE       MATURITY DATE   TAX IDENTIFICATION NUMBER
$13,000,000-00       July 3, 2001    ON DEMAND        13-2598139
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FOR VALUE RECEIVED, the undersigned promise(s) to pay ON DEMAND to the order of
Comerica Bank ("Bank" at any office of the Bank in the State of Michigan
Thirteen Million Dollars and xx/100 ********************************************
Dollars (U.S.) (or that portion of It advanced by the Bank and not repaid as
later provided) with Interest until demand or until Default, as later defined,
at a per annum rate equal to the Bank's prime rate from time to time in effect
plus 1 % per annum and after that at a rate equal to the rate of interest
otherwise prevailing under this Note plus 3% per annum (but in no event in
excess of the maximum rate permitted by law). The Bank's "prime rate" is that
annual rate of interest so designated by the Bank and which is changed by the
Bank from time to time. Interest rate changes will be effective for interest
computation purposes as and when the Bank's prime rate changes. Interest shall
be calculated on the basis of a 360-day year for the actual number of days the
principal is outstanding. Unless sooner demanded, accrued interest on this Note
shall be payable on the First day of each Month - commencing August 1. 2001 If
the frequency of Interest payments is not otherwise specified, accrued Interest
on this Note shall be payable monthly on the First day of each month, unless
sooner demanded. If any payment of principal or Interest under this Note shall
be payable on a day other than a day on which the Bank is open for business,
this payment shall be extended to the next succeeding business day and Interest
shall be payable at the rate specified in this Note during this extension. A
late payment charge equal to 5% of each late payment may be charged on any
payment not received by the Bank within 10 calendar days after the payment due
date, but ACCEPTANCE OF PAYMENT OF THIS CHARGE SHALL NOT WAIVE ANY DEFAULT UNDER
THIS NOTE.

The principal amount payable under this Note shall be the sum of all a advances
made by the Bank to or at the request of the undersigned, less principal
payments actually received in cash by the Bank. The books and records of the
Bank shall be the best evidence of the principal amount and the unpaid Interest
amount owing at any time under this Note and shall be conclusive absent manifest
error. No interest shall- accrue under this Note until the date of the first
advance made by the Bank; after that interest on all advances shall accrue and
be computed on the principal balance outstanding from time to time under this
Note until the same is paid in full. At no time shall the Bank be under any
obligation to make any advances to the undersigned pursuant to this Note
(notwithstanding anything expressed or implied in this Note or elsewhere to the
contrary, including without limit If the Bank supplies the undersigned with a
borrowing formula) and the Bank, at any time and from time to time, without
notice, and in its sole discretion, may refuse to make advances to the
undersigned without incurring any LIABILITY DUE TO THIS REFUSAL AND WITHOUT
AFFECTING THE UNDERSIGNED'S LIABILITY UNDER this Note for any and all amounts
advanced.

This Note and any other Indebtedness and liabilities of any kind of the
undersigned (or any of them) to the Bank, and any and all modifications,
renewals or extensions of it, whether joint or several, contingent or absolute,
now existing or later arising, and however evidenced (collectively
"Indebtedness") are secured by and the Bank is granted a security interest in
all items deposited in any account of any of the undersigned with the Bank and
by all proceeds of these items (cash or otherwise), all account balances of any
of the undersigned from time to time with the Bank, by all property of any of
the undersigned from time to time in the possession of the Bank and by any other
collateral, rights and properties described in each and every deed of trust,
mortgage, security agreement, pledge, assignment and other security or
collateral agreement which has been, or will at any time(s) later be, executed
by any (or all) of the undersigned to or for the benefit of the Bank
(collectively "Collateral"). Notwithstanding the above, (i) to the extent that
any portion of the Indebtedness is a consumer loan, that portion shall not be
secured by any deed of trust or mortgage on or other security interest in any of
the undersigned's principal dwelling or in any of the undersigned's real
property which is not a purchase money security interest as to that portion,
unless expressly provided to the contrary in another place, or (ii) if the
undersigned (or any of them) has(have) given or give(s) Bank a deed of trust or
mortgage covering California real property, that deed of trust or mortgage shall
not secure this Note or any other indebtedness of the undersigned (or any of
them), unless expressly provided to the contrary in another place.

If the undersigned (or any of them) or any guarantor under a guaranty of all or
part of the Indebtedness ("guarantor") (i) fail(s) to pay any of the
Indebtedness when due, by maturity, acceleration or otherwise, or fail(s) to pay
any Indebtedness owing on a demand basis upon demand; or (ii) fail(s) to comply
with any of the terms or provisions of any agreement between the undersigned (or
any of them) or any such guarantor and the Bank; or (iii) become(s) insolvent or
the subject of a voluntary or involuntary proceeding in bankruptcy, or a
reorganization, arrangement or creditor composition proceeding, (if a business
entity) cease(s) doing business as a going concern, (it a natural person) die(s)
or become(s) incompetent, (if a partnership) dissolve(s) or any general partner
of it dies, becomes incompetent or becomes the subject of a bankruptcy
proceeding or (if a corporation or a limited liability company) is the subject
of a dissolution, merger or consolidation; or (a) if any warranty or
representation made by any of the undersigned or any guarantor in connection
with this Note or any of the Indebtedness shall be discovered to be untrue or
incomplete; or (b) if there is any termination, notice of termination, or breach
of any guaranty; pledge, collateral assignment or subordination agreement
relating to all or any part of the Indebtedness; or (c) if there is any failure
by any of the undersigned or any guarantor to pay when due any of its
indebtedness (other than to the Bank) or in the observance or performance of any
term, covenant or condition in any document evidencing, securing or relating to
such indebtedness; or (d) if the Bank deems itself insecure believing that the
prospect of payment of this Note or any of the Indebtedness is impaired or shall
fear deterioration, removal or waste of any of the Collateral; or (a) if there
is filed or issued a levy or writ of attachment or garnishment or other like
judicial process upon the undersigned (or any of them) or any guarantor or any
of the Collateral, including without limit, any accounts of the undersigned (or
any of them) or any guarantor with the Bank, then the Bank, upon the occurrence
of any of these events (each a "Default"), may at its option and without prior
notice to the undersigned (or any of them), declare any or all of the
Indebtedness to be immediately due and payable (notwithstanding any provisions
contained in the evidence of it to the contrary), sell or liquidate all or any
portion of the Collateral, set off against the Indebtedness any amounts owing by
the Bank to the undersigned (or any of them), charge interest at the default
rate provided in the document evidencing the relevant Indebtedness and exercise
any one or more of the rights and remedies granted to the Bank by any agreement
with the undersigned (or any of them) or given to it under applicable law.

The undersigned acknowledge(s) that this Note matures upon issuance, and that
the Bank, at any time, without notice, and without reason, may demand that this
Note be immediately paid in full. The demand nature of this Note shall not be
deemed modified by reference to a Default in this Note or in any agreement to a
default by the undersigned or to the occurrence of an event of default
(collectively an "Event of Default"). For purposes of this Note, to the extent
there is reference to an Event of Default this reference is for the purpose of
permitting the Bank to accelerate Indebtedness not on a demand basis and to
receive interest at the default rate provided in the document evidencing the
relevant Indebtedness. It is expressly agreed that the Bank may exercise its
demand rights under this Note whether or not an Event of Default has occurred.
The Bank, with or without reason and without notice, may from time to time make
demand for partial payments under this Note and these demands shall not preclude
the Bank from demanding at any time that this Note be immediately paid in full.
All payments under this Note shall be in immediately available United States
funds, without setoff or counterclaim.

If this Note is signed by two or more parties (whether by all as makers or by
one or more as an accommodation party or otherwise), the Obligations and
undertakings under this Note shall be that of all and any two or more jointly
and also of each severally. This Note shall bind the undersigned, and the
undersigned's respective heirs, personal representatives, successors and
assigns. The undersigned waive(s) presentment, demand, protest, notice of
dishonor, notice of demand or intent to demand, notice of acceleration or
intent to accelerate, and All other notices and agree(s) that no extension or
indulgence to the undersigned (or any of them) or release, substitution or
nonenforcement of any security, or release or substitution of any of the
undersigned, any guarantor or any other party, whether with or without notice,
shall Affect the obligations of any of the undersigned. The undersigned waive(s)
all defenses or right to discharge available under Section 3-605 of the Michigan
Uniform Commercial Code and waive(s) all other suretyship defenses or right to
discharge. The undersigned agree(s) that the Bank has the right to sell, assign,
or grant participations or any interest in, any or all of the indebtedness, and
that, in connection with this right, but without limiting its ability to make
other disclosures to the full extent allowable, the Bank may disclose all
documents and information which the Bank now or later has relating to the
undersigned or the indebtedness. The undersigned agree(s) that the Bank may
provide information relating to this Note or relating to the undersigned to the
Bank's parent, affiliates, subsidiaries and service providers.

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The undersigned agree(s) to reimburse the holder or owner of this Note upon
demand for any and all costs and expenses (including without limit, court costs,
legal expenses and reasonable attorney fees, whether Inside or outside counsel
is used, whether or not suit is instituted rid, if suit Is Instituted, whether
at the trial court level, appellate level, in a bankruptcy, probate or
administrative proceeding or otherwise) occurred in COLLECTING OR ATTEMPTING TO
COLLECT THIS NOTE OR INCURRED IN ANY OTHER MANOR OR PROCEEDING RELATING TO this
Note.

The undersigned acknowledge(s) and agree(s) that there are no contrary
agreements, oral or written, establishing a term of this Note and agree(s) that
the terms and conditions of this Note -may not be amended, waived or modified
except in a writing signed by an officer of the Bank expressly stating that the
writing constitutes an amendment, waiver or modification of the terms of this
Note. As used in this Note, the word "undersigned" means, individually and
collectively, each maker, accommodation party; indorser and other party signing
this Note in a similar capacity. If any provision of this Note is unenforceable
in whole or part for any reason, the remaining provisions shall continue to be
effective. THIS NOTE IS MADE IN THE STATE OF MICHIGAN AND SHALL BE GOVERNED BY
AND CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF MICHIGAN,
WITHOUT REGARD TO CONFLICT OF LAWS PRINCIPLES.

THE MAXIMUM INTEREST RATE SHALL NOT EXCEED 25% PER ANNUM, OR THE HIGHEST
APPLICABLE USURY CEILING, WHICHEVER IS LESS.

THE UNDERSIGNED AND THE BANK ACKNOWLEDGE THAT THE RIGHT TO TRIAL BY JURY IS A
CONSTITUTIONAL ONE, BUT THAT IT MAY BE WAIVED. EACH PARTY, AFTER CONSULTING (OR
HAVING HAD THE OPPORTUNITY TO CONSULT) WITH COUNSEL OF THEIR CHOICE, KNOWINGLY
AND VOLUNTARILY, AND FOR THEIR MUTUAL BENEFIT, WAIVES ANY RIGHT TO TRIAL BY JURY
IN THE EVENT OF LITIGATION REGARDING THE PERFORMANCE OR ENFORCEMENT OF, OR IN
ANY WAY RELATED TO, US NOTE OR THE INDEBTEDNESS.

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<S>                                     <C>                                  <C>
TRANS-INDUSTRIES, INC.
--------------------------------------- By: /s/ DALE S. COENEN               Its:
       OBLIGOR NAME TYPED/PRINTED          -------------------------------        -----------------------------------
                                           SIGNATURE OF                           TITLE (if applicable)
                                           Dale S. Coenen                         Chairman
                                        By:                                  Its:
                                           -------------------------------        -----------------------------------

                                        By:                                  Its:
                                           -------------------------------        -----------------------------------

                                        By:                                  Its:
                                           -------------------------------        -----------------------------------
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2637 S. Adams Rd.           Rochester Hills          MI         48309
--------------------------------------------------------------------------------
STREET ADDRESS                  CITY                STATE     ZIP CODE


FOR BANK USE ONLY                                  CCAR#

LOAN OFFICER INITIALS   LOAN GROUP NAME  OBLIGOR NAME
KSR                     E. Oakland       Trans-Industries, Inc.

LOAN OFFICER ID. NO.   LOAN GROUP NO.    OBLIGOR NO.   NOTE NO.   AMOUNT
    618                90350                                      $13,000,000.00