Document:

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                                                                    EXHIBIT 10.8
                                                                  EXECUTION COPY

                               CUSTODIAN AGREEMENT

                                      AMONG

                      AMERICREDIT FINANCIAL SERVICES, INC.,
                                  AS CUSTODIAN,

                       FINANCIAL SECURITY ASSURANCE INC.,
                                   AS INSURER

                                       AND

                     WELLS FARGO BANK, NATIONAL ASSOCIATION,
                            AS TRUST COLLATERAL AGENT

                            DATED AS OF JULY 12, 2006

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          THIS CUSTODIAN AGREEMENT, dated as of July 12, 2006, is made with
respect to the issuance of Notes and a Certificate by AmeriCredit Automobile
Receivables Trust 2006-A-F (the "Issuer"), and is between AMERICREDIT FINANCIAL
SERVICES, INC., as custodian (in such capacity, the "Custodian"), FINANCIAL
SECURITY ASSURANCE INC. (the "Insurer") and WELLS FARGO BANK, NATIONAL
ASSOCIATION, a national banking association, as Trust Collateral Agent (the
"Trustee"). Capitalized terms used herein which are not defined herein shall
have the meanings set forth in the Sale and Servicing Agreement as hereinafter
defined.

                                   WITNESSETH:

          WHEREAS, AmeriCredit Financial Services, Inc. ("AFS") and AFS Funding
Trust ("AFS Funding") have entered into a Purchase Agreement dated as of July
12, 2006 (the "Purchase Agreement"), pursuant to which AFS has sold, transferred
and assigned to AFS Funding all of its right, title and interest in and to the
Initial Receivables and will sell, transfer and assign to AFS Funding on the
applicable Subsequent Transfer Date all of its right, title and interest in and
to the related Subsequent Receivables;

          WHEREAS, the Issuer, AFS, as Servicer (the "Servicer"), AFS Funding
and Wells Fargo Bank, National Association, as Trust Collateral Agent and as
Backup Servicer, have entered into a Sale and Servicing Agreement, dated as of
July 12, 2006 (the "Sale and Servicing Agreement"), pursuant to which AFS
Funding has sold, transferred and assigned to the Issuer all of AFS Funding's
right, title and interest in and to the Initial Receivables and will sell,
transfer and assign to the Issuer on the applicable Subsequent Transfer Date all
of AFS Funding's right, title and interest in and to the related Subsequent
Receivables;

          WHEREAS, in connection with such sales, transfers and assignments, AFS
and AFS Funding have made certain representations and warranties regarding the
Receivable Files, upon which the Insurer has relied in issuing the Note Policy;
and

          WHEREAS, the Trust Collateral Agent wishes to appoint the Custodian to
hold the Receivable Files as the custodian on behalf of the Issuer and the Trust
Collateral Agent;

          NOW, THEREFORE, in consideration of the mutual agreements herein
contained and other good and valuable consideration the receipt and adequacy of
which are hereby acknowledged, the parties agree as follows:

          1. Appointment of Custodian; Acknowledgement of Receipt. Subject to
the terms and conditions hereof, the Trust Collateral Agent hereby revocably
appoints the Custodian, but shall not be responsible for the acts or omissions
of the Custodian, and the Custodian hereby accepts such appointment, as
custodian and bailee on behalf of the Issuer and the Trust Collateral Agent, to
maintain exclusive custody of the Receivable Files relating to the Receivables
from time to time pledged to the Trust Collateral Agent as part of the Other
Conveyed Property. In performing its duties hereunder, the Custodian agrees to
act with reasonable care, using that degree of skill and attention that a
commercial bank acting in the capacity of a custodian would exercise with
respect to files relating to comparable automotive or other receivables that it
services or holds for itself or others. The Custodian hereby, as of the Closing
Date, and, with

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respect to any Subsequent Receivables as of the applicable Subsequent Transfer
Date, acknowledges receipt of the Receivable File for each Receivable listed in
the Schedule of Receivables attached as Schedule A to the Sale and Servicing
Agreement subject to any exceptions noted on the Custodian's Acknowledgement (as
defined below). As evidence of its acknowledgement of such receipt of such
Receivables, the Custodian shall execute and deliver on the Closing Date, and
with respect to any Subsequent Receivables, the applicable Subsequent Transfer
Date, the Custodian's Acknowledgement attached hereto as Exhibit A-1 or Exhibit
A-2 with respect to any Subsequent Receivable (the "Custodian's
Acknowledgement").

          2. Maintenance of Receivables Files at Office. The Custodian agrees to
maintain the Receivable Files at its office located at 4001 Embarcadero, Suite
200, Arlington, Texas 76014 or, subject to the prior written consent of the
Insurer (so long as no Insurer Default shall have occurred and be continuing),
at such other office as shall from time to time be identified to the Trust
Collateral Agent and the Insurer, and the Custodian will hold the Receivable
Files in such office on behalf of the Issuer and the Trust Collateral Agent,
clearly identified as being separate from any other instruments and files on its
records, including other instruments and files held by the Custodian and in
compliance with Section 3(c) hereof.

          3. Duties of Custodian.

          (a) Reviews of Receivable Files.

               (i) Prior to the Closing Date, the Custodian shall cause the
               Trust Collateral Agent, or such other person acceptable to the
               Insurer, to perform a random limited review of at least 300 of
               the Receivable Files relating to the Initial Receivables to
               determine that each Receivable File so reviewed includes (A) a
               fully executed original retail installment sales contract or
               promissory note, and (B) the Lien Certificate or application
               therefor. As evidence of the performance of such review, the
               Trust Collateral Agent or such other person shall execute and
               deliver to the Insurer by July 20, 2006, an Acknowledgement in
               the form of Exhibit B hereto with any exceptions related to such
               review listed on Schedule III.

               (ii) Prior to any Subsequent Transfer Date, but only at the
               written direction of the Insurer, the Custodian shall cause the
               Trust Collateral Agent, or such other person acceptable to the
               Insurer, to perform a random limited review of certain Receivable
               Files relating to the Subsequent Receivables being transferred on
               such Subsequent Transfer Date to determine that each Receivable
               File so reviewed includes (A) a fully executed original retail
               installment sales contract or promissory note, and (B) the Lien
               Certificate or application therefor; provided, that, subject to
               subclause (iii), below, the aggregate number of Receivable Files
               related to Subsequent Receivables that the Insurer may direct the
               Trust Collateral Agent to review pursuant to this subclause (ii)
               may not exceed 100. As evidence of the performance of such
               review, the Trust Collateral Agent or such other person shall
               execute and deliver to the Insurer by the related Subsequent
               Transfer Date an

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               Acknowledgement in the form of Exhibit B hereto with any
               exceptions related to such review listed on Schedule III.

               (iii) If any review conducted pursuant to subclause (i) or
               subclause (ii) reveals, in the Insurer's opinion, an
               unsatisfactory number of missing items, the Insurer, in its sole
               discretion, may require a full review of every Receivable File by
               the Trust Collateral Agent or such other party acceptable to the
               Insurer, at the expense of AmeriCredit.

          (b) Safekeeping. The Custodian shall hold the Receivable Files on
behalf of the Trust Collateral Agent clearly identified as being separate from
all other files or records maintained by the Custodian at the same location and
shall maintain such accurate and complete accounts, records and computer systems
pertaining to each Receivable File as will enable the Trust Collateral Agent to
comply with the terms and conditions of the Sale and Servicing Agreement. Each
Receivable shall be stamped on both of the first page and the signature page (if
different) in accordance with the instructions from time to time provided by the
Insurer, and the form and content of the stamp shall be acceptable to the
Insurer. Each Receivable shall be identified on the books and records of the
Custodian in a manner that (i) is consistent with the practices of a commercial
bank acting in the capacity of custodian with respect to similar receivables,
(ii) indicates that the Receivables are held by the Custodian on behalf of the
Trust Collateral Agent and (iii) is otherwise necessary, as reasonably
determined by the Custodian, to comply with the terms of this Custodian
Agreement. The Custodian shall conduct, or cause to be conducted, periodic
physical inspections of the Receivable Files held by it under this Custodian
Agreement, and of the related accounts, records and computer systems, in such a
manner as shall enable the Trust Collateral Agent, the Insurer and the Custodian
to verify the accuracy of the Custodian's inventory and recordkeeping. Such
inspections shall be conducted at such times, in such manner and by such persons
including, without limitation, independent accountants, as the Insurer or the
Trust Collateral Agent may request and the cost of such inspections shall be
borne directly by the Custodian and not by the Trust Collateral Agent. The
Custodian shall promptly report to the Insurer and the Trust Collateral Agent
any failure on its part to hold the Receivable Files and maintain its accounts,
records and computer systems as herein provided and promptly take appropriate
action to remedy any such failure. Upon request, the Custodian shall make copies
or other electronic file records (e.g., diskettes, CD's, etc.) (the "Copies") of
the Receivable Files and shall deliver such Copies to the Trust Collateral Agent
and the Trust Collateral Agent shall hold such Copies on behalf of the
Noteholders. Subject to Section 3(d) hereof, the Custodian shall at all times
maintain the original of the (i) fully executed original retail installment
sales contract or promissory note and (ii) Lien Certificate or application
therefore (if no such Lien Certificate has yet been issued), in each case
relating to each Receivable in a fireproof vault; provided, however, the Lien
Certificate may be maintained electronically by the Registrar of Titles of the
applicable state pursuant to applicable state laws, with confirmation thereof
maintained by the Custodian or a third-party service provider.

          (c) Access to Records. The Custodian shall, subject only to the
Custodian's security requirements applicable to its own employees having access
to similar records held by the Custodian, which requirements shall be consistent
with the practices of a commercial bank acting in the capacity of custodian with
respect to similar files or records, and at such times as may be reasonably
imposed by the Custodian, permit only the Noteholders, the Insurer and the

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Trust Collateral Agent or their duly authorized representatives, attorneys or
auditors to inspect the Receivable Files and the related accounts, records, and
computer systems maintained by the Custodian pursuant hereto at such times as
the Noteholders, the Insurer or the Trust Collateral Agent may reasonably
request.

          (d) Release of Documents. Consistent with the practices of a
commercial bank acting in the capacity of custodian with respect to similar
files or records, the Custodian may release any Receivable in the Receivable
Files to the Servicer, if appropriate, under the circumstances provided in
Section 3.3(b) of the Sale and Servicing Agreement.

          (e) Administration; Reports. The Custodian shall, in general, attend
to all non-discretionary details in connection with maintaining custody of the
Receivable Files on behalf of the Trust Collateral Agent. In addition, the
Custodian shall assist the Trust Collateral Agent generally in the preparation
of any routine reports to Noteholders or to regulatory bodies, to the extent
necessitated by the Custodian's custody of the Receivable Files.

          (f) Review of Lien Certificates. On or before the Closing Date, and on
or before the applicable Subsequent Transfer Date in the case of any Subsequent
Receivables, the Custodian shall deliver to the Trust Collateral Agent a listing
in the form attached hereto as Schedule II of Exhibit A-1, or Schedule II of
Exhibit A-2 with respect to any Subsequent Receivables, of all Receivables with
respect to which a Lien Certificate, showing AFS (or an Originating Affiliate or
Titled Third-Party Lender) as secured party, was not included in the related
Receivable File as of such date. In addition, the Custodian shall deliver to the
Trust Collateral Agent and the Insurer an exception report in the form attached
hereto as Schedule II of Exhibit A-1, or Schedule II of Exhibit A-2 with respect
to any Subsequent Receivables (i) no later than the last Business Day of the
calendar month during which the 90th day after the Closing Date (or, with
respect to Subsequent Receivables, the 90th day after the applicable Subsequent
Transfer Date) occurred, (ii) no later than the last Business Day of the
calendar month during which the 180th day after the Closing Date (or, with
respect to Subsequent Receivables, the 180th day after the applicable Subsequent
Transfer Date) occurred and (iii) no later than the last Business Day of the
calendar month during which the 240th day after the Closing Date (or, with
respect to Subsequent Receivables, the 240th day after the applicable Subsequent
Transfer Date) occurred.

          4. Instructions; Authority to Act. The Custodian shall be deemed to
have received proper instructions with respect to the Receivable Files upon its
receipt of written instructions signed by a Responsible Officer of the Trust
Collateral Agent. Such instructions may be general or specific in terms. A copy
of any such instructions shall be furnished by the Trust Collateral Agent to the
Trustee, the Issuer and the Insurer.

          5. Custodian Fee. For its services under this Agreement, the Custodian
shall be entitled to reasonable compensation to be paid by the Servicer.

          6. Indemnification by the Custodian. The Custodian agrees to indemnify
the Issuer, the Owner Trustee, the Trust Collateral Agent, the Backup Servicer,
the Insurer and the Trustee for any and all liabilities, obligations, losses,
damage, payments, costs or expenses of any kind whatsoever (including the fees
and expenses of counsel) that may be imposed on,

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incurred or asserted against the Issuer, the Owner Trustee, the Trust Collateral
Agent, the Backup Servicer and the Insurer and the Trustee and their respective
officers, directors, employees, agents, attorneys and successors and assigns as
the result of any act or omission in any way relating to the maintenance and
custody by the Custodian of the Receivable Files; provided, however, that the
Custodian shall not be liable for any portion of any such liabilities,
obligations, losses, damages, payments or costs or expenses due to the willful
misfeasance, bad faith or gross negligence of the Issuer, the Owner Trustee, the
Trust Collateral Agent, the Collateral Agent, the Backup Servicer, the Insurer
or the Trustee or the officers, directors, employees and agents thereof. In no
event shall the Custodian be liable to any third party for acts or omissions of
the Custodian.

          7. Advice of Counsel. The Custodian and the Trust Collateral Agent
further agree that the Custodian shall be entitled to rely and act upon advice
of counsel with respect to its performance hereunder as custodian and shall be
without liability for any action reasonably taken pursuant to such advice,
provided that such action is not in violation of applicable Federal or state
law.

          8. Effective Period, Termination, and Amendment; Interpretive and
Additional Provisions. This Custodian Agreement shall become effective as of the
date hereof and shall continue in full force and effect until terminated as
hereinafter provided. Prior to an Insurer Default, this Custodian Agreement may
be amended at any time by mutual agreement of the Insurer, the Trust Collateral
Agent and the Custodian and may be terminated by either the Insurer or the
Custodian by giving written notice to the other parties, such termination to
take effect no sooner than thirty (30) days after the date of such notice;
provided, however, that the Insurer may terminate this Custodian Agreement at
any time in its sole discretion and any termination by the Insurer shall take
effect immediately. So long as AFS is serving as Custodian, any termination of
AFS as Servicer under the Sale and Servicing Agreement shall terminate AFS as
Custodian under this Agreement. If an Insurer Default shall have occurred and be
continuing, with the prior written consent of the Note Majority, this Custodian
Agreement may be amended at any time by mutual agreement of the parties hereto
and may be terminated by any party by giving written notice to the other
parties, such termination to take effect no sooner than thirty (30) days after
the date of such notice. Upon any termination or amendment of this Custodian
Agreement, the Trust Collateral Agent, in the case of amendments, and the party
seeking termination, in the case of terminations, shall give written notice to
Standard & Poor's, a division of the McGraw-Hill Companies, Inc. ("Standard &
Poor's"), Moody's Investors Service ("Moody's") and Fitch Inc. ("Fitch")
(collectively, the "Rating Agencies"). Immediately after receipt of notice of
termination of this Custodian Agreement, the Custodian shall deliver the
Receivable Files to the Trust Collateral Agent on behalf of the Noteholders, and
at the Custodian's expense, at such place or places as the Trust Collateral
Agent, or the Insurer in the case of a termination by the Insurer, may
designate, and the Trust Collateral Agent, or its agent, as the case may be,
shall act as custodian for such Receivables Files on behalf of the Noteholders
until such time as a successor custodian, approved by the Insurer, has been
appointed. If, within seventy-two (72) hours after the termination of this
Custodian Agreement, the Custodian has not delivered the Receivable Files in
accordance with the preceding sentence, the Insurer or, if an Insurer Default
shall have occurred and be continuing, the Trust Collateral Agent, may enter the
premises of the Custodian and remove the Receivable Files from such premises. In
connection with the administration of this Agreement, the parties may agree from
time to time upon the interpretation

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of the provisions of this Agreement as may in their joint opinion be consistent
with the general tenor and purposes of this Agreement, any such interpretation
to be signed by all parties and annexed hereto.

          9. Governing Law. This Custodian Agreement shall be governed by and
construed in accordance with the laws of the State of New York without regard to
the conflict of law provisions thereof (other than Sections 5-1401 and 5-1402 of
the New York General Obligations Law).

          10. Notices. All demands, notices and communications hereunder shall
be in writing, electronically delivered, delivered or mailed, and shall be
deemed to have been duly given upon receipt (a) in the case of the Custodian, at
the following address: AmeriCredit Financial Services, Inc., 801 Cherry Street,
Suite 3900, Fort Worth, Texas 76102, Attention: Chief Financial Officer, (b) in
the case of the Trust Collateral Agent, at the following address: Wells Fargo
Bank, National Association, Sixth and Marquette Avenue, MAC N9311-161,
Minneapolis, Minnesota 55479 (facsimile number (612) 667-3464), Attention:
Corporate Trust Services/Asset Backed Administration, (c) in the case of the
Insurer, at the following address: Financial Security Assurance Inc., 31 West
52nd Street, New York, New York 10019, Attention: Transaction Oversight
Department, (d) in the case of Moody's, at the following address: 99 Church
Street, New York, New York 10007, (e) in the case of Fitch, at the following
address: One State Street Plaza, New York, New York 10004 and (f) in the case of
Standard and Poor's via electronic delivery to Servicer_reports@sandp.com; for
any information not available in electronic format, hard copies should be sent
to the following address: 55 Water Street, 41st floor, New York, New York
10041-0003, Attention: ABS Surveillance Group, or at such other address as shall
be designated by such party in a written notice to the other parties.

          11. Binding Effect. This Custodian Agreement shall be binding upon and
shall inure to the benefit of the parties hereto and their respective successors
and assigns. Concurrently with the appointment of a successor trustee under the
Sale and Servicing Agreement, the parties hereto shall amend this Custodian
Agreement to make said successor trustee, the successor to the Trust Collateral
Agent hereunder.

                  [Remainder of page intentionally left blank]

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          IN WITNESS WHEREOF, each of the parties hereto has caused this
Custodian Agreement to be executed in its name and on its behalf by a duly
authorized officer on the day and year first above written.

                                         WELLS FARGO BANK, NATIONAL ASSOCIATION,
                                         as Trust Collateral Agent

                                         By: /s/ Marianna C. Stershic
                                             -----------------------------------
                                             Name: Marianna C. Stershic
                                             Title: Vice President

                                         AMERICREDIT FINANCIAL SERVICES, INC.,
                                         as Custodian

                                         By: /s/ Susan B. Sheffield
                                             -----------------------------------
                                             Name: Susan B. Sheffield
                                             Title: Senior Vice President,
                                                    Structured Finance

                                         FINANCIAL SECURITY ASSURANCE INC.

                                         By: /s/ Mark Castiglione
                                             -----------------------------------
                                             Name: Mark Castiglione
                                             Title: Managing Director

The foregoing Custodian Agreement
is hereby confirmed and accepted
as of the date first above written.

AMERICREDIT AUTOMOBILE RECEIVABLES TRUST 2006-A-F,
as Issuer

By: WILMINGTON TRUST COMPANY,
   not in its individual capacity but solely
   as Owner Trustee on behalf of the Trust

By: /s/ Michele C. Harra
    ----------------------------------
    Name: Michele C. Harra
    Title: Financial Services Officer

                              [Custodian Agreement]

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                                                                     EXHIBIT A-1

                           CUSTODIAN'S ACKNOWLEDGEMENT

          AmeriCredit Financial Services, Inc. (the "Custodian"), acting as
Custodian under a Custodian Agreement, dated as of July 12, 2006, among the
Custodian, Wells Fargo Bank, National Association, as Trust Collateral Agent and
Financial Security Assurance Inc., pursuant to which the Custodian holds on
behalf of the Trust Collateral Agent for the benefit of the Noteholders certain
"Receivable Files," as defined in the Sale and Servicing Agreement, dated as of
July 12, 2006 (the "Sale and Servicing Agreement"), among AmeriCredit Automobile
Receivables Trust 2006-A-F, as Issuer, AFS Funding Trust, as Seller, AmeriCredit
Financial Services, Inc., as Servicer, and Wells Fargo Bank, National
Association, as Trust Collateral Agent and Backup Servicer, hereby acknowledges
receipt of the Receivable File for each Receivable listed in the Schedule of
Receivables attached as Schedule A to said Sale and Servicing Agreement except
as noted in the Exception List attached as Schedule I and the Lien Perfection
Exception List attached as Schedule II hereto.

          IN WITNESS WHEREOF, AmeriCredit Financial Services, Inc. has caused
this acknowledgement to be executed by its duly authorized officer as of this
20th day of July, 2006.

                                         AMERICREDIT FINANCIAL SERVICES, INC.,
                                         as Custodian

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

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                                   SCHEDULE I

                            Custodian Exception List

                                       1

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                                   SCHEDULE II

                         Lien Perfection Exception List

                                       2

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                                                                     EXHIBIT A-2

                           CUSTODIAN'S ACKNOWLEDGEMENT

          AmeriCredit Financial Services, Inc. (the "Custodian"), acting as
Custodian under a Custodian Agreement, dated as of July 12, 2006, among the
Custodian, Wells Fargo Bank, National Association, as Trust Collateral Agent and
Financial Security Assurance Inc., pursuant to which the Custodian holds on
behalf of the Noteholders certain "Receivable Files," as defined in the Sale and
Servicing Agreement, dated as of July 12, 2006, among AmeriCredit Automobile
Receivables Trust 2006-A-F, AFS Funding Trust, as Seller, AmeriCredit Financial
Services, Inc., as Servicer, and Wells Fargo Bank, National Association, as
Trust Collateral Agent and as Backup Servicer, hereby acknowledges receipt of
the Receivable File for each Receivable listed in Schedule A to the Subsequent
Transfer Agreement dated as of ___________, 20__, among AmeriCredit Automobile
Receivables Trust 2006-A-F, as Issuer, AFS Funding Trust, as Seller, AmeriCredit
Financial Services, Inc., as Servicer, Wells Fargo Bank, National Association,
as Trust Collateral Agent and as Backup Servicer, except as noted in the
Exception List attached as Schedule I and the Lien Perfection Exception List
attached as Schedule II hereto.

          IN WITNESS WHEREOF, AmeriCredit Financial Services, Inc. has caused
this acknowledgement to be executed by its duly authorized officer as of this
__th day of __________, 20__.

                                         AMERICREDIT FINANCIAL SERVICES, INC.,
                                         as Custodian

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

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                                   SCHEDULE I

                            Custodian Exception List

                                        1

<PAGE>

                                   SCHEDULE II

                         Lien Perfection Exception List

                                        2

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                                                                       EXHIBIT B

                             TRUST COLLATERAL AGENT
                                 ACKNOWLEDGEMENT

          Wells Fargo Bank, National Association, acting as Trust Collateral
Agent pursuant to that certain Custodian Agreement, dated as of July 12, 2006
(the "Custodian Agreement"), among AmeriCredit Financial Services, Inc. ("AFS"),
Wells Fargo Bank, National Association, as Trust Collateral Agent and Financial
Security Assurance Inc., ("Financial Security") hereby acknowledges that in
accordance with Section 3(a)[(i)]/[(ii)] of the Custodian Agreement it has
conducted a limited review of [at least 300]/[___] of the Receivable Files and
hereby confirms that each Receivable File so reviewed, with the exceptions noted
on Schedule III hereto, included (i) a fully executed original retail
installment sales contract or promissory note, and (ii) the Lien Certificate or
a copy of the application therefor. The Trust Collateral Agent has not otherwise
reviewed the [related Subsequent] Receivables or the related Receivable Files
for compliance with the terms of the Sale and Servicing Agreement. Capitalized
terms used herein and not otherwise defined herein shall have the meanings
ascribed to such terms in the Sale and Servicing Agreement.

          IN WITNESS WHEREOF, Wells Fargo Bank, National Association has caused
this acknowledgement to be executed by its duly authorized officer as of this
___th day of __________, 2006.

                                         WELLS FARGO BANK, NATIONAL
                                         ASSOCIATION, as Trust Collateral Agent

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

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                                  SCHEDULE III

                      Trust Collateral Agent Exception List

                                        4<PAGE>

                                                                    Exhibit 10.9
                                                                  Execution Copy

                      SERIES 2006-A-F TRI-PARTY REMITTANCE
                              PROCESSING AGREEMENT
                                  July 12, 2006

          JPMorgan Chase Bank, N.A. ("Processor"), AmeriCredit Financial
Services, Inc. ("AmeriCredit") and Wells Fargo Bank, National Association, as
Trustee (the "Trustee"), agree as follows:

          1. Servicing Arrangements. AmeriCredit, as Servicer (the "Servicer"),
AFS Funding Trust, as Seller ("Seller"), AmeriCredit Automobile Receivables
Trust 2006-A-F (the "Trust") and the Trustee entered into a Sale and Servicing
Agreement dated as of July 12, 2006 (as amended, supplemented and otherwise
modified from time to time, the "Sale and Servicing Agreement"), relating to the
Receivables (as such term is defined in the Sale and Servicing Agreement),
pursuant to which the Receivables were sold, transferred, assigned, or otherwise
conveyed to the Trust. The Sale and Servicing Agreement contemplates the
engagement of a processor and includes terms for the opening of the Lockbox
Account (as defined herein), and the Indenture contemplates that the Lockbox
Account will be assigned and pledged to the Trust Collateral Agent. The Sale and
Servicing Agreement does not include specific terms for the provision of data
processing services and deposit of remittance items. Such terms are set forth in
this Tri-Party Remittance Processing Agreement (the "Agreement"). All
capitalized terms used herein and not otherwise defined herein shall have the
meanings specified in the Sale and Servicing Agreement.

          2. Remittance Processing Services. In order to provide a means of
collection of the Receivables which will allow the Trustee to receive the
proceeds of the Receivables and related security without AmeriCredit or its
Affiliates having access to the funds, the parties hereto agree for the benefit
of the Trustee that the processing services (the "Service(s)") of Processor will
be used for the collection and the deposit of remittances related to the
Receivables and related security.

          3. Customer Remittances.

     (a) Obligors of the Receivables will be directed by AmeriCredit to forward
their remittances to Processor at a post office address (the "Lockbox") assigned
by Processor. Processor, acting for the exclusive benefit of the Trustee, shall
have unrestricted and exclusive access to the mail directed to this address.
AmeriCredit agrees to notify Processor thirty (30) days in advance of any change
in Obligor remittance statements and/or mailing schedule.

     (b) Third party money wire transfer providers, which shall include Western
Union Financial Services, Inc. (other such providers may perform the services
herein with the prior written consent of the Insurer) ("ACH Service") may from
time to time electronically deposit funds in the Lockbox Account (as defined
herein) on behalf of Obligors and such ACH Service shall be authorized by
Processor to electronically debit the Lockbox Account for the amounts of any
return items from Obligors; provided, however, the electronic debit of the
Lockbox Account for any return items by all ACH Services may not exceed $100,000
in the aggregate per day. Processor is authorized to establish such
arrangements, on such terms deemed prudent by Processor, with such ACH Service
concerning the electronic access to the Lockbox Account.

<PAGE>

          4. Collection of Mail. Processor will collect mail from the post
office at regular intervals each business day, but not less than two times
daily.

          5. Endorsement of Items. Processor will endorse, on behalf of
AmeriCredit, checks and other deposited items that appear to be for deposit to
the credit of AmeriCredit or its Affiliates in accordance with Processor's
National Retail Lockbox Processing Agreements and Instructions, Treasury
Management Services Agreement, Commercial Account Agreement or other applicable
agreement and related service terms (individually and collectively, the "Bank
Agreements"), as appropriate.

          6. Credit of Funds to Account.

     (a) Processor will process the checks and other deposited items and credit
the total amount to the account described below (the "Lockbox Account"). The
Lockbox Account will be established at Processor (ABA No.: 122100024) as account
number 662632991. Pursuant to the terms of the Indenture and during the term of
this Agreement, and except as otherwise required by law (e.g., for purposes of
attachment, execution and other forms of legal process), all collected funds
held in the Lockbox Account shall be deemed to be the Trustee's funds, and the
Trustee will have exclusive right to control such funds and to make demand upon
or otherwise require Processor to make payment of any such funds to any person.
In the event a successor Processor has become Processor, the successor
Processor's notice of the new Lockbox Account pursuant to Section 19 shall amend
and replace the Lockbox Account above without the execution or filing of any
document or any further act by any of the parties to this Agreement.

     (b) Unless otherwise directed by the Trustee (with the written consent of
the Insurer), AmeriCredit agrees that all collected funds on deposit in the
Lockbox Account shall be transferred from the Lockbox Account within two
Business Days by wire transfer in immediately available funds to the following
account: Wells Fargo Bank, National Association, Account No. 0001038377 f/b/o
20226001; ABA No. 121000248 (the "Collection Account").

     (c) Each party hereto agrees that all funds deposited into the Lockbox
Account will not be subject to deduction, setoff, banker's lien, or any other
similar right in favor of any person, except that Processor or ACH Service may
setoff against the Lockbox Account the face amount of any check or other item
deposited in and credited to such Lockbox Account which is subsequently returned
for any reason or is otherwise not collected, necessary account adjustments as a
result of errors and overdrafts related to return items. If there are
insufficient funds in the Lockbox Account to pay items charged back to the
Lockbox Account and AmeriCredit has not remitted payment within 10 days of
demand therefor by Processor, the Trustee shall, upon provision of evidence
satisfactory to the Trustee, make payment to Processor for any such amounts from
funds in the Collection Account but, only to the extent that such amount was
actually received by the Trustee. If there are insufficient funds in the Lockbox
Account to pay items charged back to the Lockbox Account, AmeriCredit shall
remit payment within 2 days of demand therefore by Processor.

          7. Applicable Documentation. This Agreement supplements, rather than
replaces, Processor's deposit account agreement, terms and conditions, and
lockbox agreement and other standard documentation in effect from time to time
with respect to the Lockbox, the Lockbox Account or the services provided in
connection therewith (the "Applicable Documentation"), which Applicable
Documentation will continue to apply to the Lockbox, the

                                        2

<PAGE>

Lockbox Account and such services, and the respective rights, powers, duties,
obligations, liabilities and responsibilities of the parties thereto and hereto,
to the extent not expressly conflicting with the provisions of this Agreement
(however, in the event of any such conflict, the provisions of this Agreement
shall control). Prior to issuing any instructions, the Trustee shall provide
Processor with such documentation as Processor may reasonably request to
establish the identity and authority of the individuals issuing instructions on
behalf of the Trustee. The Trustee may request the Processor to provide other
services with respect to the Lockbox and the Lockbox Account; however, if such
services are not authorized or otherwise covered under the Applicable
Documentation, Processor's decision to provide any such services shall be made
in its sole discretion (including without limitation being subject to
AmeriCredit and/or the Trustee executing such Applicable Documentation or other
documentation as Processor may require in connection therewith).

          8. Processor's General Duties. Notwithstanding anything to the
contrary in this Agreement: (i) Processor shall have only the duties and
responsibilities with respect to the matters set forth herein as is expressly
set forth in writing herein and shall not be deemed to be an agent, bailee or
fiduciary for any party hereto; (ii) Processor shall be fully protected in
acting or refraining from acting in good faith without investigation on any
notice, instruction or request purportedly furnished to it by AmeriCredit or the
Trustee in accordance with the terms hereof, in which case the parties hereto
agree that Processor has no duty to make any further inquiry whatsoever; (iii)
it is hereby acknowledged and agreed that Processor has no knowledge of (and is
not required to know) the terms and provisions of the Sale and Servicing
Agreement referred to in Section 1 above or any other related documentation or
whether any actions by the Trustee, AmeriCredit or any other person or entity
are permitted or a breach thereunder or consistent or inconsistent therewith;
and (iv) Processor shall not be liable to any party hereto or any other person
for any action or failure to act under or in connection with this Agreement
except to the extent such conduct constitutes its own willful misconduct or
negligence.

          9. Processing of Items. The provision of services shall be governed by
the Bank Agreements, as may be amended from time to time, subject to the prior
written consent to any such amendments of a material nature by the Trustee, the
Insurer and AmeriCredit, which consents shall not be unreasonably withheld,
conditioned or delayed.

          10. Trust Correspondence. Any envelopes collected from the Lockbox
which contain correspondence and other documents (including, but not limited to,
certificates of title, tax receipts, insurance policy endorsements and any other
documents or communications of or relating to the Receivables) will be sent to
the Servicer at its current address. Any enclosed payment(s), coupon(s) or
check(s) will be processed and deposited by Processor in accordance with the
provisions of the Agreement.

          11. Confidentiality. Processor agrees that all information concerning
the Obligors of the Receivables which comes into Processor's possession pursuant
to this Agreement, other than that which is already known by Processor or to the
general public, will be treated in a confidential manner.

          12. Fees. Unless otherwise agreed by Processor, AmeriCredit shall pay
Processor the fees set forth for this Service in Processor's most current Price
List as in effect from time to time, plus additional fees for the performance of
services beyond the terms of this

                                        3

<PAGE>

Agreement, or resulting from increased expenses incurred by the failure of
AmeriCredit to furnish within a reasonable period of time following a request by
Processor, data in a form acceptable to Processor. Processor shall look first to
AmeriCredit for payment of such fees. If AmeriCredit fails to pay Processor
within thirty (30) days of receipt of invoice but in any event no later than
forty-five (45) days from the date of the invoice, Processor will notify the
Trustee in writing as soon as practicable and provide to the Trustee a copy of
such unpaid invoice. Subject to rights to terminate this Agreement pursuant to
Section 17, Processor will continue to perform its services under this Agreement
and the amount reflected in such invoice will be paid to Processor by the
Trustee out of funds in the Collection Account on the next Distribution Date (as
defined below), which follows by at least three Business Days the date of giving
such notice to the Trustee. Any fees unpaid after such date will be considered
unpaid fees. "Distribution Date" means the sixth day of the following calendar
month, or, if such day is not a Business Day, the immediately following Business
Day.

          13. Processor's Liability for Nonperformance. In performing the
Services, Processor will exercise ordinary care and act in good faith. Processor
shall be deemed to have exercised ordinary care if its action or failure to act
is in conformity with general banking usages or is otherwise a commercially
reasonable practice of the banking industry. Processor's liability relating to
its or its employees', officers' or agents' performance or failure to perform
hereunder, or for any other action or inaction of Processor, or its employees,
officers or agents, shall be limited exclusively to the lesser of (i) any direct
losses which are caused by the failure of Processor, its employees, officers or
agents to exercise reasonable care and/or act in good faith, and (ii) the face
amount of any item, check, payment or other funds lost or mishandled by the
action or inaction of Processor. Under no circumstances will Processor be liable
for any general, indirect, special, incidental, punitive or consequential
damages or for damages caused, in whole or in part, by the action or inaction of
AmeriCredit or the Trustee, whether or not such action or inaction constitutes
negligence. Processor will not be liable for any damage, loss, liability or
delay caused by accidents, strikes, fire, flood, war, riot, equipment breakdown,
electrical or mechanical failure, acts of God or any cause which is reasonably
unavoidable or beyond its reasonable control. AmeriCredit agrees that the fees
charged by Processor for the performance of this Service shall be deemed to have
been established in contemplation of these limitations on Processor's liability.
In addition, AmeriCredit agrees to indemnify and hold Processor harmless from
all liability on the part of Processor under this Section 13 except such
liability as is attributable to the gross negligence of Processor.

          14. Indemnification by AmeriCredit. AmeriCredit agrees to indemnify,
defend and hold Processor harmless from and against any and all damage, loss,
cost, expense or liability of any kind, including, without limitation,
reasonable attorneys' fees and court costs, which results, directly or
indirectly, in whole or in part, from any negligence and willful misconduct or
infidelity of AmeriCredit or any agent or employee of AmeriCredit, incurred in
connection with this Agreement, Lockbox or the Lockbox Account or any
interpleader proceeding relating thereto or from Processor acting upon
information furnished by AmeriCredit under this Agreement. AmeriCredit will
remain liable for all indemnification under this Section 14 after its removal
and/or resignation as Servicer.

          15. Other Agreements. Processor shall not be bound by any agreement
between any of the other parties hereto irrespective of whether Processor has
knowledge of the existence of any such agreement or the terms and provisions
thereof.

                                        4

<PAGE>

          16. Records. This Agreement and the performance by Processor of the
Services hereunder shall not relieve Processor of any obligation imposed by law
or contract regarding the maintenance of records.

          17. Amendment and Termination. This Agreement may only be amended in
writing signed by all parties to this Agreement and the Insurer. AmeriCredit or
Trustee may immediately terminate this Agreement for cause, provided, however,
that a similar agreement has been executed with a successor processor reasonably
acceptable to the Trustee and the Insurer or the Trustee and the Insurer have
consented to such termination. The Trustee may immediately terminate this
Agreement, at any time with the consent of the Insurer, and shall do so, at the
direction of the Insurer, upon written notice to the other parties hereto.
Otherwise, any party may terminate this Agreement on sixty (60) days' prior
written notice to the others; provided, however, that AmeriCredit shall promptly
notify the Insurer of receipt of any such notice and shall arrange for
alternative lockbox processing services satisfactory to the Insurer prior to the
termination of the Services.

          18. Successor Servicer. Each of Processor and the Trustee agrees that
if the Servicer has been terminated or resigns as Servicer, this Agreement shall
not thereupon terminate and the successor servicer appointed pursuant to the
Sale and Servicing Agreement shall succeed, except as otherwise provided herein,
to all rights, benefits, duties and obligations of the Servicer hereunder. Prior
to the termination or resignation of the Trustee or the Servicer, the Trustee or
the Servicer, respectively, shall provide notice to Processor in accordance with
the terms and conditions to which each of the Trustee or the Servicer,
respectively, is itself entitled upon termination or resignation.

          19. Successor Processor. Any company or national banking association
into which Processor may be merged or converted or with which it may be
consolidated, or any company or national banking association resulting from any
merger, conversion or consolidation to which it shall be a party or any company
or national association to which Processor may sell or transfer all or
substantially all of its business (provided any such company or national banking
association shall be a company organized under the laws of any state of the
United States or a national banking association and shall be eligible to perform
all of the duties imposed upon it by this Agreement) shall be the successor to
Processor hereunder without the execution or filing of any document or any
further act by any of the parties to this Agreement; provided, however, that
Processor notify the Trustee, the Insurer and AmeriCredit of any such merger,
conversion or consolidation within 30 days of its occurrence. If such successor
requires the establishment of a new account, then the successor Processor shall
as soon as practicable after the occurrence of any such merger, conversion or
consolidation (i) establish the new Lockbox Account and (ii) send written notice
to the Trustee, the Insurer and AmeriCredit with respect to the new Lockbox
Account number.

          20. Third Party Beneficiary. This Agreement shall inure to the benefit
of the Insurer, and all covenants and agreements in this Agreement shall be for
the benefit of and run directly to the Insurer, and the Insurer shall be
entitled to rely on and, subject to the limitations on liability set forth
herein, enforce such covenants to the same extent as if it were a party to this
Agreement; provided, however, that, notwithstanding this provision, the
liability of Processor under this Agreement shall not under any circumstances
exceed the liability of Processor in the absence of any such third-party
beneficiary.

                                        5

<PAGE>

          21. Governing Law. This Agreement shall be governed by the laws of the
State of Texas. All parties hereby waive all rights to a trial by jury in any
action or proceeding relating to the Lockbox, Lockbox Account or this Agreement.

          22. Notices. All written notices required by this Agreement shall be
delivered or mailed to the other parties at the addresses set forth below or to
such other address as a party may specify in writing.

Processor:     JPMorgan Chase Bank, N.A.
               2200 Ross Avenue, Floor 10
               Mail code TX1-2946,
               Dallas, TX 75201-2787
               Attention: Belinda Crow

               With a copy to:

               JPMorgan Chase Bank, N.A.
               2200 Ross Avenue, Floor 3
               Mail code TX1-2903,
               Dallas, TX 75201-2787
               Attention: Michael Lister

AmeriCredit:   AmeriCredit Financial Services, Inc.
               801 Cherry Street, Suite 3900
               Fort Worth, Texas 76102
               Attention: Chief Financial Officer

Trustee:       Wells Fargo Bank, National Association
               Sixth Street and Marquette Avenue
               MAC N9311-161
               Minneapolis, Minnesota 55479
               Attention: AmeriCredit Automobile Receivables Trust 2006-A-F

Insurer:       Financial Security Assurance Inc.
               31 West 52nd Street
               New York, New York 10019
               Attention: Senior Vice President, Transaction Oversight

          23. Bankruptcy. Processor hereby covenants and agrees that, prior to
the date which is one year and one day after the payment in full of the Notes
and all amounts owed under the Indenture and the Sale and Servicing Agreement,
any loan facility or any other securities issued by a special purpose,
"bankruptcy remote" vehicle or trust (an "AmeriCredit Issuer SPE"), directly or
indirectly formed by AmeriCredit or any affiliate thereof, Processor will not
institute against or join with any other person in instituting against any
AmeriCredit Issuer SPE or any non-issuer special purpose, "bankruptcy remote,"
vehicle or trust (each an "AmeriCredit SPE"), any proceeding or file any
petition against any such AmeriCredit SPE, under any bankruptcy, insolvency or
similar law for the relief or aid of debtors (including, without limitation,
Title 11 of

                                        6

<PAGE>

the United States Code or any amendment thereto), seeking the dissolution,
liquidation, arrangement, reorganization or similar relief of any such
AmeriCredit SPE or the appointment of a receiver, trustee, custodian or
liquidator of any such AmeriCredit SPE, or issue any writ, order, judgment
warrant of attachment, execution or similar process against a substantial part
of the property, assets or business of any such AmeriCredit SPE. This covenant
shall survive the termination of this Agreement.

                                        7

<PAGE>

PROCESSOR:                             AMERICREDIT:

JPMORGAN CHASE BANK, N.A.              AMERICREDIT FINANCIAL SERVICES, INC.

By: /s/ Tandra Davis                   By: /s/ Susan B. Sheffield
    --------------------------------       ------------------------------------
    Name: Tandra Davis                     Name: Susan B. Sheffield
    Title: Officer                         Title: Senior Vice President,
                                                  Structured Finance

TRUSTEE:

WELLS FARGO BANK,
NATIONAL ASSOCIATION,
as Trustee

By: /s/ Marianna C. Stershic
    --------------------------------
    Name: Marianna C. Stershic
    Title: Vice President

           [Series 2006-A-F Tri-Party Remittance Processing Agreement]

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