QuickLinks -- Click here to rapidly navigate through this document

Exhibit 10.2

Agreement

    This Agreement, dated as of July 2, 2001, is by and between ATC Distribution
Group, Inc. ("Buyer") and Aftermarket Technology Corp. ("Seller").

    WHEREAS, ATCDG Acquisition Corp., Inc. ("Acquisition Corp.") and Seller
entered into a Stock Purchase Agreement, dated as of September 1, 2000 (as
amended to the date hereof, the "Stock Purchase Agreement"), pursuant to which
Acquisition Corp. acquired all of the outstanding capital stock of Buyer on
October 27, 2000. Terms not otherwise defined herein shall have the meanings
ascribed to them in the Stock Purchase Agreement.

    WHEREAS, following such purchase Acquisition Corp. was merged with and into
Buyer and Buyer succeeded to all the rights and obligations of Acquisition Corp.
under the Stock Purchase Agreement.

    WHEREAS, pursuant to Section 2.04 of the Stock Purchase Agreement, Seller is
to pay Buyer an amount equal to the amount by which Final Net Working Capital is
less than $81,531,000 and Final Net Cash is less than $(2,504,000).

    WHEREAS, pursuant to Section 2.03 of the Stock Purchase Agreement, Buyer
delivered to Seller its calculations of Proposed Net Working Capital and
Proposed Net Cash in its letter to Seller dated February 23, 2001 ("Buyer's
Calculation") setting forth a Proposed Net Working Capital of $75,169,000 and a
Proposed Net Cash of $(2,778,000), equating to a proposed total amount of
$6,636,000 owing from Seller to Buyer pursuant to Section 2.04 of the Stock
Purchase Agreement (excluding interest on such amount calculated in accordance
with the Stock Purchase Agreement).

    WHEREAS, pursuant to Section 2.03 of the Stock Purchase Agreement, Seller
delivered to Buyer its notices of disagreement with respect to the Proposed Net
Working Capital and Proposed Net Cash in its letters to Buyer dated March 23,
2001 and April 27, 2001 ("Seller's Notices of Disagreement"), disputing certain
portions of the Proposed Net Working Capital and Proposed Net Cash calculations
and setting forth a proposed Net Working Capital of $79,005,000 and a proposed
Net Cash of $(2,555,000), equating to a proposed total amount of $2,577,000
owing from Seller to Buyer pursuant to Section 2.04 of the Stock Purchase
Agreement (excluding interest on such amount calculated in accordance with the
Stock Purchase Agreement).

    WHEREAS, pursuant to Section 2.03, Buyer and Seller have engaged in
negotiations regarding the amounts set forth in Buyer's Calculation and Seller's
Notices of Disagreement and now deem it desirable and in their best interests to
agree upon the amounts of Final Net Working Capital and Final Net Cash.

    NOW, THEREFORE, in consideration of the foregoing premises and the mutual
covenants and agreements hereinafter set forth, the parties hereto agree as
follows:

    1.  Final Net Working Capital and Final Net Cash.  Pursuant to Sections 2.03
and 2.04 of the Stock Purchase Agreement, Buyer and Seller hereby agree that:

    (a) Final Net Working Capital is $77,907,000 and Final Net Cash is
$(2,555,000), which amounts are final and binding upon the parties hereto.

    (b) Based on Final Net Working Capital and Final Net Cash, Seller owes to
Buyer an aggregate amount of $3,675,000 (the "Agreed Amount") pursuant to
Sections 2.04(a) and (c) of the Stock Purchase Agreement, plus Interest (as
defined below) thereon. Seller paid $732,000 of the Agreed Amount, plus $21,750
of Interest thereon, to Buyer on April 27, 2001, leaving a balance of $2,943,000
of the Agreed Amount, plus Interest thereon, to be paid. As used herein,
"Interest" on any amount means interest on such amount from October 27, 2000 to
the date of payment of such amount as calculated in accordance with Section 2.04
of the Stock Purchase Agreement. Exhibits A and B to this Agreement set forth
the Interest calculations on all amount

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

paid or payable under this Agreement. Seller acknowledges and agrees that the
interest payment due on April 27, 2001 under the Amended and Restated Note,
dated as of October 27, 2000, from Buyer to Seller (the "Amended Note") in the
amount of $753,750 was offset against a portion of the Agreed Amount, that such
interest payment was satisfied in full by Buyer in a timely manner under the
terms of the Amended Note and that no overdue interest or penalties are due from
Buyer in connection with such interest payment.

    (c) The balance of the Agreed Amount, plus Interest thereon, shall be paid
by Seller to Buyer as follows:

     (i) The amount of $         2,943,000, plus $108,000 of Interest thereon,
shall be due and payable from Seller to Buyer on July 2, 2001 by wire transfer
of immediately available funds; and

    (ii) Any amounts not paid by Seller to Buyer in accordance with
Section 1(c)(i) shall bear interest from the applicable date of payment until
paid by Seller to Buyer, with the interest calculated in accordance with
Section 2.04 of the Stock Purchase Agreement

    2.  Waiver and Release of Claims Regarding Financial Statements.  Buyer
hereby waives, releases and discharges Seller and its officers, directors,
employees and Affiliates (collectively, the "Released Parties") from any and all
claims, liabilities, demands, Damages and causes of action (whether known or
unknown, fixed or contingent) that Buyer may have or claim to have to the extent
arising out of or relating to the Financial Statements or the representations
and warranties made by Seller in Section 3.09 of the Stock Purchase Agreement
being false, incorrect or inaccurate with respect to any account or item of the
type that is a constituent part of Net Working Capital or Net Cash (in no event
shall any of the items or matters described on Schedules 1.01 or 1.02 to the
Stock Purchase Agreement constitute for purposes of this Section 2 an account or
item of the type that is a constituent part of Net Working Capital or Net Cash).
The foregoing shall not constitute a waiver, release or discharge of or
otherwise affect Buyer's rights and Seller's obligations under
Section 9.01(a)(v) of the Stock Purchase Agreement; it being understood and
agreed that the reference to Net Working Capital in Section 9.01(a)(v) of the
Stock Purchase Agreement shall refer to the proposed working capital calculation
delivered by Seller to Buyer on April 27, 2001 as supplemented by the
liabilities set forth on Exhibit C hereto.

    3.  Miscellaneous.  

    (a) This Agreement shall be governed by and construed and enforced in
accordance with the internal laws (as opposed to the conflicts of laws
provisions) of the State of New York.

    (b) This Agreement may be executed in any number of counterparts with the
same effect as if the signatures thereto were upon one instrument.

    (c) Any provision of this Agreement may be amended or waived if, and only
if, such amendment or waiver is in writing and signed, in the case of amendment,
by all parties hereto, or in the case of a waiver, by the party against whom the
waiver is to be effective.

[Signature page follows]

2

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

    IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed by their respective authorized officers as of the day and the year
first above written.

        ATC DISTRIBUTION GROUP, INC.
 
 
 
 
/s/ ROBERT J. FITZSIMMONS   

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

        By: Robert J. Fitzsimmons         Title: Vice President                
                AFTERMARKET TECHNOLOGY CORP.
 
 
 
 
/s/ JOSEPH SALAMUNOVICH   

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

        By: Joseph Salamunovich         Title: Vice President                  
                 

3

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

Exhibit A

Exhibit A
Calculation of Offset Balance

$ in millions

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

  Net
Working
Capital

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

  Net
Cash

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

  Total

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

  Estimated   $ 81.531   $ (2.504 )      
Buyer Proposed
 
$
75.169
 
$
(2.778
)
 
 
 
Seller Proposed
 
$
79.005
 
$
(2.555
)
 
 
 
Buyer Proposed Adjustment
 
$
(6.362
)
$
(0.274
)
$
(6.636
) Seller Proposed Adjustment   $ (2.526 ) $ (0.051 ) $ (2.577 )
Undisputed Amount
 
 
 
 
 
 
 
$
(2.577
)

   

 
  Oct-00

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

  Nov-00

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

  Dec-00

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

  Jan-01

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

  Feb-01

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

  Mar-01

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

  Apr-01

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

  Applicable Rate     6.804 %   6.759 %   6.687 %   6.371 %   5.390 %   5.089 %
  4.840 % Beg Date     27-Oct-00     31-Oct-00     30-Nov-00     31-Dec-00    
30-Jan-01     28-Feb-01     31-Mar-01   End Date     31-Oct-00     30-Nov-00    
31-Dec-00     30-Jan-01     28-Feb-01     31-Mar-01     27-Apr-01   # Days     4
    30     31     30     29     31     27  
Interest on Undisputed Amount
 
$
(0.002
)
$
(0.014
)
$
(0.015
)
$
(0.013
)
$
(0.011
)
$
(0.011
)
$
(0.009
)
Offset Balance

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

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  Beginning Amount   $ (2.577 ) $ (2.579 ) $ (2.593 ) $ (2.608 ) $ (2.621 ) $
(2.632 ) $ (2.644 ) Accrued Interest   $ (0.002 ) $ (0.014 ) $ (0.015 ) $ (0.013
) $ (0.011 ) $ (0.011 ) $ (0.009 ) Offset Interest Amounts   $ —   $ —   $ —   $
—   $ —   $ —   $ 0.754      

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

 

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

 

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

 

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

 

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

 

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

 

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

  Ending Amount   $ (2.579 ) $ (2.593 ) $ (2.608 ) $ (2.621 ) $ (2.632 ) $
(2.644 ) $ (1.899 )

4

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

Exhibit B

Exhibit B
Calculation of Interest Accrued on Purchase Price Adjustment

$in millions

Agreed Purchase Price Adjustment

  $3.675

   
   
   
   
   
   
   
   
   
  Oct-00

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

  Nov-00

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

  Dec-00

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

  Jan-01

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

  Feb-01

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

  Mar-01

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

  Apr-01

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

  Apr-01

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

  May-01

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

  Jun-01

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

  Jul-01

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

  Applicable Rate     6.804 %   6.759 %   6.687 %   6.371 %   5.390 %   5.089 %
  4.840 %   4.840 %   4.340 %   3.943 %   3.790 % Beg Date     27-Oct-00    
31-Oct-00     30-Nov-00     31-Dec-00     30-Jan-01     28-Feb-01     31-Mar-01
    27-Apr-01     30-Apr-01     31-May-01     30-Jun-01   End Date     31-Oct-00
    30-Nov-00     31-Dec-00     30-Jan-01     28-Feb-01     31-Mar-01    
27-Apr-01     30-Apr-01     31-May-01     30-Jun-01     2-Jul-01   # Days     4
    30     31     30     29     31     27     3     31     30     2  
Interest on Purchase Price Adjustment
 
$
0.003
 
$
0.020
 
$
0.021
 
$
0.019
 
$
0.016
 
$
0.016
 
$
0.013
 
$
0.001
 
$
0.011
 
$
0.010
 
$
0.001
 
Balance Due

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

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Principal Balance
 
$
3.675
 
$
3.675
 
$
3.675
 
$
3.675
 
$
3.675
 
$
3.675
 
$
3.675
 
$
2.943
 
$
2.943
 
$
2.943
 
$
2.943
  Accrued Interest   $ 0.003   $ 0.023   $ 0.044   $ 0.063   $ 0.079   $ 0.095  
$ 0.108   $ 0.087   $ 0.098   $ 0.108   $ 0.108   Offset Principal              
                        $ (0.732 )                         Offset Interest   $ —
  $ —   $ —   $ —   $ —   $ —   $ (0.022 ) $ —   $ —   $ —   $ —      

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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

  Balance Due   $ 3.678   $ 3.698   $ 3.719   $ 3.738   $ 3.754   $ 3.770   $
3.029   $ 3.030   $ 3.041   $ 3.051   $ 3.051  

   

   

5

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

Exhibit C

Exhibit C

Liabilities Included In Adjustment Amount

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

   
Mexicali—Additional Payroll Tax Liabilities
 
61 Items Submitted After 120 Day Period Mexicali—Other Additional Liabilities  
148 Items Submitted After 120 Day Period Buyer Submitted Additional Liabilities
  99 Items Submitted After 120 Day Period
Sub-total
 
308
JDE West Accrued Payables
 
24
Total Liabilities Included In Adjustment Amount
 
332

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

QuickLinks

Agreement