<PAGE>

                                                                EXECUTION COPY




                            SERIES 1999-B SUPPLEMENT

                            dated as of June 17, 1999

                                       to

                            SPREAD ACCOUNT AGREEMENT

                           dated as of March 25, 1993,

                             as amended and restated

                             as of November 19, 1998

                                      among

                             ARCADIA FINANCIAL LTD.

                        ARCADIA RECEIVABLES FINANCE CORP.

                        FINANCIAL SECURITY ASSURANCE INC.

                                       and

                  NORWEST BANK MINNESOTA, NATIONAL ASSOCIATION

<PAGE>

<TABLE>
<CAPTION>
                                TABLE OF CONTENTS
                                                                                        Page
<S>                <C>
                                Article I.

                                DEFINITIONS

Section 1.1        Definitions.............................................................2
Section 1.2        Rules of Interpretation.................................................5

                                Article II.

          CREDIT ENHANCEMENT FEE; SERIES SUPPLEMENTS; THE COLLATERAL

Section 2.1        Series 1999-B Credit Enhancement Fee....................................6
Section 2.2        Series Supplements......................................................6
Section 2.3        Grant of Security Interest by Arcadia Financial and the Seller..........6

                               Article III.

                              SPREAD ACCOUNT

Section 3.1        Establishment of Series 1999-B Spread Account; Initial Deposit into
                   Series 1999-B Spread Account............................................7
Section 3.2        Spread Account Additional Deposits......................................8

                                Article IV.

                               MISCELLANEOUS

Section 4.1        Further Assurances......................................................8
Section 4.2        Governing Law...........................................................8
Section 4.3        Counterparts............................................................8
Section 4.4        Headings................................................................8

                   Schedule I
</TABLE>


<PAGE>

                            SERIES 1999-B SUPPLEMENT

         SERIES 1999-B SUPPLEMENT, dated as of June 17, 1999 (the "Series 1999-B
Supplement"), by and among ARCADIA FINANCIAL LTD., a Minnesota corporation
("Arcadia Financial"), ARCADIA RECEIVABLES FINANCE CORP., a Delaware corporation
(the "Seller"), FINANCIAL SECURITY ASSURANCE INC., a New York stock insurance
company ("Financial Security"), NORWEST BANK MINNESOTA, NATIONAL ASSOCIATION, a
national banking association, in its capacity as Indenture Trustee under the
Indenture and as Collateral Agent hereunder.


                                    RECITALS

         1. The parties hereto have previously entered into a Spread Account
Agreement, dated as of March 25, 1993, as amended and restated as of November
19, 1998 (the "Spread Account Agreement"), and, as contemplated by Section 2.02
of the Spread Account Agreement, this Series 1999-B Supplement constitutes a
Series Supplement to the Spread Account Agreement so that hereafter this Series
1999-B Supplement shall form a part of the Spread Account Agreement for all
purposes thereof, and all references herein and hereafter to the Spread Account
Agreement shall mean the Spread Account Agreement, as supplemented hereby.

         2. Arcadia Automobile Receivables Trust, 1999-B (the "Series 1999-B
Trust") is being formed contemporaneously herewith pursuant to the Series 1999-B
Trust Agreement (as defined herein).

         3. Pursuant to the Series 1999-B Sale and Servicing Agreement, the
Seller is selling to the Series 1999-B Trust all of its right, title and
interest in and to the Initial Receivables (as defined in the Series 1999-B Sale
and Servicing Agreement) and certain other Trust Property (as defined in the
Series 1999-B Trust Agreement).

         4. Pursuant to the Series 1999-B Indenture, the Series 1999-B Trust is
issuing the Series 1999-B Notes (as defined herein).

         5. The Seller has requested that Financial Security issue the Series
1999-B Note Policy to the Trustee to guarantee payment of the Scheduled Payments
(as deemed in such Policy) on each Payment Date in respect of the Series 1999-B
Notes.

         6. In partial consideration of the issuance of the Series 1999-B Note
Policy, the Seller has agreed that Financial Security shall have certain rights
as Controlling Party, to the extent set forth in the Spread Account Agreement
and the Series 1999-B Indenture.

         7. The Seller is a wholly-owned special purpose subsidiary of Arcadia
Financial. The Series 1999-B Trust has agreed to pay the Series 1999-B Credit


<PAGE>

Enhancement Fee to the Seller in consideration of the obligations of the Seller
and Arcadia Financial pursuant hereto and in consideration of the obligations of
Arcadia Financial pursuant to the Series 1999-B Insurance Agreement (such
obligations forming part of the Series 1999-B Insurer Secured Obligations as
referred to herein). The Series 1999-B Insurer Secured Obligations form part of
the consideration to Financial Security for its issuance of the Series 1999-B
Note Policy.

         8. In order to secure the performance of the Series 1999-B Secured
Obligations, to further effect and enforce the subordination provisions to which
the Series 1999-B Credit Enhancement Fee is subject, and in consideration of the
receipt of the Series 1999-B Credit Enhancement Fee, Arcadia Financial and the
Seller have agreed to pledge the Series 1999-B Collateral as Collateral to the
Collateral Agent for the benefit of Financial Security and for the benefit of
the Trustee on behalf of the Trust, upon the terms and conditions set forth
herein.


                                   AGREEMENTS

         In consideration of the premises, and for other good and valuable
consideration, the adequacy, receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

                                    ARTICLE I

                                   DEFINITIONS

         Section 1.1  DEFINITIONS. All terms defined in Section 1.1 of the
Series 1999-B Sale and Servicing Agreement shall have the same meaning with
respect to this Series 1999-B Supplement. The following terms shall have the
following meanings:

         "COLLECTION ACCOUNT SHORTFALL" means, with respect to Series 1999-B and
any Distribution Date, the Deficiency Claim Amount, as defined in the Series
1999-B Sale and Servicing Agreement, with respect to such Distribution Date.

         "DEEMED CURED" means with respect to Series 1999-B, (a) with respect to
an event that has occurred pursuant to clause (A)(i) of the definition of
Trigger Event, as of a Determination Date with respect to Series 1999-B, that no
event as specified in clause (A)(i) of the definition thereof with respect to
such Series shall have occurred as of such Determination Date or as of any of
the two consecutively preceding Determination Dates, and (b) with respect to an
event that has occurred pursuant to clause (A)(ii) or clause (A)(iii) of the
definition of Trigger Event, as of the next Determination Date which occurs in a
calendar month which is a multiple of three months succeeding the Series 1999-B
Closing Date, that no event specified in clause (A)(ii) or clause (A)(iii) of
the definition of Trigger Event with respect to such Series shall have occurred
as of such Determination Date.


                                       2

<PAGE>

         "INITIAL PRINCIPAL AMOUNT" means $650,000,000 with respect to Series
1999-B.

         "INITIAL SPREAD ACCOUNT DEPOSIT" means $0 for Series 1999-B.

         "INITIAL SPREAD ACCOUNT MAXIMUM AMOUNT" means, with respect to Series
1999-B and any Distribution Date, an amount equal to the greater of (i) 9% of
the Series 1999-B Balance as of the close of business on such Distribution Date
and (ii) the Spread Account Minimum Amount as of the close of business on such
Distribution Date.

         "SERIES 1999-B BALANCE" means, with respect to Series 1999-B and any
Distribution Date, the aggregate principal amount of the Series 1999-B Notes as
of such Distribution Date (after giving effect to the distributions in respect
of principal on the Notes made on such Distribution Date).

         "SERIES 1999-B COLLATERAL" has the meaning specified in Section
2.3(a) hereof.

         "SERIES 1999-B CREDIT ENHANCEMENT FEE" means the amount distributable
on each Distribution Date pursuant to Section 4.6(vi) and (vii) of the Series
1999-B Sale and Servicing Agreement.

         "SERIES 1999-B INDENTURE" means the Indenture, dated as of June 1,
1999, among the Series 1999-B Trust, the Trustee and the Indenture Collateral
Agent.

         "SERIES 1999-B NOTE POLICY" means the financial guaranty insurance
policy issued by Financial Security with respect to the Series 1999-B Notes.

         "SERIES 1999-B NOTES" means the Class A-1, Class A-2, Class A-3, Class
A-4 and Class A-5 Notes issued pursuant to the Series 1999-B Indenture.

         "SERIES 1999-B OWNER TRUSTEE" means Wilmington Trust Company, not in
its individual capacity but solely as Owner Trustee, or its successor in
interest, and any successor Owner Trustee appointed as provided in the Series
1999-B Trust Agreement.

         "SERIES 1999-B RECEIVABLE" means each Receivable referenced on the
Schedule of Receivables attached to the Series 1999-B Sale and Servicing
Agreement, as supplemented from time to time during the Funding Period by one or
more Subsequent Transfer Agreements.

         "SERIES 1999-B RESERVE ACCOUNT" means the Reserve Account established
pursuant to Section 4.1(d) of the Series 1999-B Sale and Servicing Agreement.

         "SERIES 1999-B SALE AND SERVICING AGREEMENT" means the Sale and
Servicing Agreement, dated as of June 1, 1999, among the Series 1999-B Trust,
Arcadia Financial, in its individual capacity and as Servicer, the Seller and
the Backup Servicer, as such agreement may be supplemented, amended or modified
from time to time.


                                       3

<PAGE>

         "SERIES 1999-B SECURED OBLIGATIONS" means the Insurer Secured
Obligations and the Trustee Secured Obligations with respect to Series 1999-B.

         "SERIES 1999-B SPREAD ACCOUNT" means the Spread Account established
pursuant to Section 3.1(a) hereof.

         "SERIES 1999-B SUPPLEMENT" means this Series 1999-B Supplement which
constitutes a Series Supplement to the Spread Account Agreement.

         "SERIES 1999-B TRUST AGREEMENT" means the Trust Agreement, dated as of
June 1, 1999, among the Seller, Financial Security and the Series 1999-B Owner
Trustee.

         "SPREAD ACCOUNT ADDITIONAL DEPOSIT" means, with respect to Series
1999-B and any Subsequent Transfer Date, an amount equal to 0.00% of the
aggregate Principal Balance (as of the related Subsequent Cutoff Date) of the
Subsequent Receivables being transferred to the Series 1999-B Trust on such
Subsequent Transfer Date or such greater amount as required by the Rating
Agencies to confirm that the rating assigned to the Series 1999-B Notes will be
in the highest category by such Rating Agencies.

         "SPREAD ACCOUNT MAXIMUM AMOUNT" means, with respect to Series 1999-B
and any Distribution Date:

                  (i) if no Insurance Agreement Event of Default with respect to
         Series 1999-B has occurred and is continuing, no Capture Event has
         occurred and is continuing, no Trigger Event has occurred on the
         related Determination Date, and if any Trigger Event with respect to
         Series 1999-B has occurred as of a prior Determination Date, such
         Trigger Event is Deemed Cured as of the related Determination Date, the
         Initial Spread Account Maximum Amount with respect to Series 1999-B and
         such Distribution Date;

                  (ii) if an event specified in clause (A) of the definition of
         Trigger Event with respect to Series 1999-B has occurred as of the
         Determination Date or has occurred as of a prior Distribution Date (and
         whether or not a Trigger Event shall occur or shall have occurred in
         connection with such event), and such event is not Deemed Cured as of
         the related Determination Date and no Insurance Agreement Event of
         Default with respect to Series 1999-B has occurred and is continuing
         and no Capture Event has occurred and is continuing, the Spread Account
         Maximum Amount shall be equal to the greater of (i) 12% of the Series
         1999-B Balance as of the close of business on such Distribution Date
         and (ii) the Spread Account Minimum Amount as of the close of business
         on such Distribution Date; or

                  (iii) if (A) an Insurance Agreement Event of Default with
         respect to Series 1999-B has occurred and is continuing or (B) a
         Capture Event has occurred and is continuing as of the related
         Determination Date, the Spread Account Maximum Amount shall be equal to
         the greater of (i) 25% of the Series 1999-B


                                       4

<PAGE>

         Balance as of the close of business on such Distribution Date and
         (ii) the Spread Account Minimum Amount as of the close of business on
         such Distribution Date.

        "SPREAD ACCOUNT MINIMUM AMOUNT" means, with respect to Series 1999-B
and any Distribution Date, an amount equal to the greater of:

                  (i)      $100,000, and

                  (ii)     the lesser of:

                           (A) 2.0% of the Initial Principal Amount of Series
                               1999-B, and

                           (B) the Series 1999-B Balance.

         "TRIGGER EVENT" means, with respect to Series 1999-B and as of a
Determination Date, the occurrence of any of the events specified in clause (A)
together with the occurrence of the event specified in clause (B):

         (A)      (i)      the Average Delinquency Ratio for such
                           Determination Date shall be 8.26% or greater;

                  (ii)     with respect to any Determination Date, the
                           Cumulative Default Rate shall be equal to or greater
                           than the percentage set forth in Column A of Schedule
                           I attached hereto corresponding to such Determination
                           Date;

                  (iii)    with respect to any Determination Date, the
                           Cumulative Net Loss Rate shall be equal to or greater
                           than the percentage set forth in Column B of Schedule
                           I attached hereto corresponding to such Determination
                           Date;

         (B)      The amount specified with respect to such Series in the last
                  sentence of Section 2.09(f) of the Spread Account Agreement is
                  positive on such Determination Date, and such amount has not
                  been deposited in the related Tag Account on such
                  Determination Date.

         Section 1.2 RULES OF INTERPRETATION. The terms "hereof," "herein,"
"hereto" or "hereunder," unless otherwise modified by more specific reference,
shall refer to this Series 1999-B Supplement. Unless otherwise indicated in
context, the terms "Article," "Section" or "Exhibit" shall refer to an Article
or Section of, or Exhibit to, this Series 1999-B Supplement. The definition of a
term shall include the singular, the plural, the past, the present, the future,
the active and the passive forms of such term. A term defined herein and used
herein preceded by a Series designation, shall mean such term as it relates to
the Series designated.


                                       5

<PAGE>

                                  ARTICLE II.

           CREDIT ENHANCEMENT FEE; SERIES SUPPLEMENTS; THE COLLATERAL

         Section 2.1 SERIES 1999-B CREDIT ENHANCEMENT FEE. The Series 1999-B
Sale and Servicing Agreement provides for the payment to the Seller of the
Series 1999-B Credit Enhancement Fee, to be paid to the Seller by distribution
of such amounts to the Collateral Agent for deposit and distribution pursuant to
this Agreement. The Seller and Arcadia Financial hereby agree that payment of
the Series 1999-B Credit Enhancement Fee in the manner and subject to the
conditions set forth herein and in the Series 1999-B Sale and Servicing
Agreement is adequate consideration and the exclusive consideration to be
received by the Seller or Arcadia Financial for the obligations of the Seller
pursuant hereto and the obligations of Arcadia Financial pursuant hereto
(including, without limitation, the transfer by the Seller to the Collateral
Agent of the Initial Spread Account Deposit with respect to Series 1999-B) and
pursuant to the Series 1999-B Insurance Agreement. The Seller and Arcadia
Financial hereby agree with the Trustee and with Financial Security that payment
of the Series 1999-B Credit Enhancement Fee to the Seller is expressly
conditioned on subordination of the Series 1999-B Credit Enhancement Fee to
payments on the Notes and Certificates (if any) of any Series, payments of
amounts due to Financial Security and the other obligations of the Trusts, in
each case to the extent provided in Section 4.6 of the Standard Terms and
Conditions or Section 4.6 of the related Sale and Servicing Agreement, as
applicable, and Section 3.03 of the Spread Account Agreement, and the Security
Interest of the Secured Parties in the Series 1999-B Collateral is intended to
effect and enforce such subordination and to provide security for the Series
1999-B Secured Obligations and subject to the terms hereof the Secured
Obligations with respect to other Series.

         Section 2.2 SERIES SUPPLEMENTS. As provided in and subject to the
conditions specified in Section 2.02 of the Spread Account Agreement, the
parties hereto are entering into this Series 1999-B Supplement with respect to
the Series 1999-B Securities.

         Section 2.3 GRANT OF SECURITY INTEREST BY ARCADIA FINANCIAL AND THE
SELLER.

         (a) In order to secure the performance of the Secured Obligations with
respect to each Series, the Seller (and Arcadia Financial, to the extent it may
have any rights therein) hereby pledges, assigns, grants, transfers and conveys
to the Collateral Agent, on behalf of and for the benefit of the Secured Parties
to secure the Secured Obligations, a lien on and security interest in (which
lien and security interest is intended to be prior to all other liens, security
interests or other encumbrances), all of its right, title and interest in and to
the following (all being collectively referred to herein as the "Series 1999-B
Collateral"):


                                       6

<PAGE>

          (i)  the Series 1999-B Credit Enhancement Fee and all rights and
     remedies that the Seller may have to enforce payment of the Series 1999-B
     Credit Enhancement Fee whether under the Series 1999-B Sale and Servicing
     Agreement or otherwise;

          (ii) the Series 1999-B Spread Account established pursuant to Section
     3.1 of this Series 1999-B Supplement and Section 3.01 of the Spread
     Account Agreement, and each other account owned by the Seller and
     maintained by the Collateral Agent (including, without limitation, all
     monies, checks, securities, investments and other documents from time
     to time held in or evidencing any such accounts);

          (iii) all of the Seller's right, title and interest in and to
     investments made with proceeds of the property described in clauses (i)
     and (ii) above, or made with amounts on deposit in the Series 1999-B
     Spread Account; and

          (iv) all distributions, revenues, products, substitutions, benefits,
     profits and proceeds, in whatever form, of any of the foregoing.

               (b) In order to effectuate the provisions and purposes of this
Series 1999-B Supplement, including for the purpose of perfecting the
security interests granted hereunder, the Seller represents and warrants that
it has, prior to the execution of this Series 1999-B Supplement, executed and
filed an appropriate Uniform Commercial Code financing statement in Minnesota
sufficient to ensure that the Collateral Agent, as agent for the Secured
Parties, has a first priority perfected security interest in all Series
1999-B Collateral which can be perfected by the filing of a financing
statement.

                                  ARTICLE III.

                                 SPREAD ACCOUNT

         Section 3.1 ESTABLISHMENT OF SERIES 1999-B SPREAD ACCOUNT; INITIAL
DEPOSIT INTO SERIES 1999-B SPREAD ACCOUNT.

         (a) On or prior to the Closing Date, the Collateral Agent shall
establish with respect to Series 1999-B, at its office or at another depository
institution or trust company, an Eligible Account, designated "Spread Account -
Series 1999-B - Norwest Bank Minnesota, National Association, as Collateral
Agent for Financial Security Assurance Inc. and another Secured Party" (the
"Series 1999-B Spread Account").

         (b) On the Closing Date relating to Series 1999-B, the Collateral Agent
shall deposit the Initial Spread Account Deposit with respect to Series 1999-B
received from the Seller into the Series 1999-B Spread Account.


                                       7

<PAGE>

         Section 3.2 SPREAD ACCOUNT ADDITIONAL DEPOSITS. On each Subsequent
Transfer Date, the Series 1999-B Trust will, pursuant to Section 2.4 of the
Series 1999-B Sale and Servicing Agreement, deliver on behalf of the Seller the
Spread Account Additional Deposit for such Subsequent Transfer Date to the
Collateral Agent. The Collateral Agent shall deposit each such Spread Account
Additional Deposit received from the Series 1999-B Trust into the Series 1999-B
Spread Account.

                                   ARTICLE IV.

                                  MISCELLANEOUS

         Section 4.1 FURTHER ASSURANCES. Each party hereto shall take such
action and deliver such instruments to any other party hereto, in addition to
the actions and instruments specifically provided for herein, as may be
reasonably requested or required to effectuate the purpose or provisions of this
Series 1999-B Supplement or to confirm or perfect any transaction described or
contemplated herein.

         Section 4.2 GOVERNING LAW. This Series 1999-B Supplement shall be
governed by and construed, and the obligations, rights and remedies of the
parties hereunder shall be determined, in accordance with the laws of the State
of New York.

         Section 4.3 COUNTERPARTS. This Series 1999-B Supplement may be executed
in two or more counterparts by the parties hereto, and each such counterpart
shall be considered an original and all such counterparts shall constitute one
and the same instrument.

         Section 4.4 HEADINGS. The headings of sections and paragraphs and the
Table of Contents contained in this Series 1999-B Supplement are provided for
convenience only. They form no part of this Series 1999-B Supplement and shall
not affect its construction or interpretation.


                                       8

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Series 1999-B
Supplement as of the date set forth on the first page hereof.

                                     ARCADIA FINANCIAL LTD.


                                     By:          /S/ JOHN A. WITHAM
                                          -------------------------------------
                                          Name:   John A. Witham
                                          Title:  Executive Vice President and
                                                  Chief Financial Officer


                                     ARCADIA RECEIVABLES FINANCE CORP.


                                     By:          /S/ JOHN A. WITHAM
                                          -------------------------------------
                                          Name:   John A. Witham
                                          Title:  Senior Vice President and
                                                  Chief Financial Officer


                                     FINANCIAL SECURITY ASSURANCE INC.


                                     By:          /S/ SCOTT GORDON
                                          -------------------------------------
                                                  Authorized Officer


                                     NORWEST BANK MINNESOTA, NATIONAL
                                        ASSOCIATION, as Trustee


                                     By:          /S/ EILEEN R. O'CONNOR
                                          -------------------------------------



                                     NORWEST BANK MINNESOTA, NATIONAL
                                        ASSOCIATION, as Collateral Agent


                                     By:          /S/ EILEEN R. O'CONNOR
                                          -------------------------------------



<PAGE>

<TABLE>
<CAPTION>

                                                                                           SCHEDULE I

Determination Date*                     Cumulative Default Rate               Cumulative Net Loss Rate
       (month)                                 (Column A)                           (Column B)
<S>                                     <C>                                   <C>

       0 to 3                                    2.11%                                1.05%
       3 to 6                                    4.21%                                2.11%
       6 to 9                                    6.10%                                3.05%
       9 to 12                                   7.79%                                3.90%
      12 to 15                                  10.03%                                5.02%
      15 to 18                                  12.07%                                6.04%
      18 to 21                                  13.85%                                6.93%
      21 to 24                                  15.40%                                7.70%
      24 to 27                                  16.21%                                8.10%
      27 to 30                                  16.86%                                8.43%
      30 to 33                                  17.43%                                8.71%
      33 to 36                                  17.92%                                8.96%
      36 to 39                                  18.15%                                9.08%
      39 to 42                                  18.34%                                9.17%
      42 to 45                                  18.49%                                9.25%
      45 to 48                                  18.62%                                9.31%
      48 to 51                                  18.73%                                9.36%
      51 to 54                                  18.81%                                9.41%
      54 to 57                                  18.88%                                9.44%
      57 to 60                                  18.93%                                9.46%
      60 to 63                                  18.96%                                9.48%
      63 to 66                                  18.98%                                9.49%
      66 to 69                                  18.99%                                9.50%
    69 and higher                               19.00%                                9.50%
</TABLE>


--------
* Such Determination Date occurring after the designated calendar months
succeeding the Series 1999-B Closing Date appearing first in the column below,
and prior to or during the designated calendar months succeeding the Series
1999-B Distribution Date appearing second in the column below.