              UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C. 20549


                                    FORM 8-K


                                 CURRENT REPORT
                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934



         Date of Report (Date of earliest event reported) MayJune 1615, 2005


                     NAVISTAR FINANCIAL 2004-B OWNER TRUST
             (Exact name of Registrant as specified in its charter)


                                    Delaware
                 (State or other jurisdiction of incorporation)



            333-67112-06                               51-0337491
      (Commission File Number)            (I.R.S. Employer Identification No.)




  425 N. Martingale Road Schaumburg, Illinois              60173
   (Address of principal executive offices)             (Zip Code)



         Registrant's telephone number including area code 630-753-4000


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                    INFORMATION TO BE INCLUDED IN THE REPORT


Item 8.01.  Other Events.


            On MayJune 1615, 2005, the Registrant made available the
            Monthly Servicer Certificate for the Period of AprilMay 2005
            for the NAVISTAR FINANCIAL 2004-B OWNER TRUST,  which  is
            attached as Exhibit 20 hereto.


Item 9.01   Financial Statements and Exhibits.


         (c)      See attached Exhibit 20.


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                                   SIGNATURE


Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.


                      NAVISTAR FINANCIAL 2004-B OWNER TRUST
             (Exact name of Registrant as specified in its charter)



Date:  MayJune 2624, 2005                                             By:/s/ PAUL E. MARTIN
-----------------------                          --------------------------
                                                 Paul E. Martin
                                                 Vice President & Controller


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                                  EXHIBIT INDEX

Exhibit No.    Description

   20          Navistar Financial 2004-B Owner Trust
               Monthly Servicer Certificate #67, dated MayJune 1615, 2005


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                                EXHIBIT 20

                                     Navistar Financial 2004 - B Owner Trust                                                                                   Page 1 of 3
                                                 For the Month of AprilMay 2005
                     Distribution Date of MayJune 1615, 2005
                                                   Servicer Certificate  #67

Original Pool Amount                                                                                     $398,463,516.43
Subsequent Receivables (transferred 11/17/04)                                   $148,829,668.80
Subsequent Receivables (transferred 12/17/04)                                   $151,771,733.07
Subsequent Receivables (transferred 01/18/05)                                     $50,934,291.61
Beginning Pool Balance                                                                                 $651633,567145,111461.7957
Beginning Pool Factor                                                                                               0.86875718441948

Principal and Interest Collections:
     Principal Collected (Incl. Servicer Advance Repay)                 $1817,146375,583328.7921
     Interest Collected                                                                                   $3,779650,486079.6719
     Mandatory Prepayments                                                                                             $0.00
Additional Deposits:

     Repurchase Amounts                                                                                                   $0.00

     Liquidation Proceeds / Recoveries                                                         $130217,073631.0833
Total Additional Deposits                                                                                   $130217,073631.0833

Repos / Chargeoffs                                                                                                 $275588,066683.4354
Aggregate Number of Notes Charged Off                                       37                                      51

Total Available Funds                                                                                     $2221,056228,143087.5415

Ending Pool Balance                                                                                       $633615,145196,461401.5740
Ending Pool Factor                                                                                                     0.84419488202627

Servicing Fee                                                                                                           $542527,972621.5922
     memo: Servicer will allocate $1,500.00 of Servicing
           Fee as Administration Fee
Repayment of Servicer Advances                                                                                $014,951.0058
                                                                                        
Reserve Account:
                                                                                     ======================================
                                                                                             Beginning Balance  (see Memo Item)                         $20,150,446.01          Memo Item - Reserve Account
Reserve     Target Account:                                                                        Percentage                                                    3.00%        Opening balance      $1918,547994,013363.3585
                                                                                             Target Balance                                             $18,455,892.04          + Trans Base                                   $0.00
     BeginningSpecified Balance  (seeYield MemoSupplement Item)                         Amount                                   $21,005,1050.3300          + Sub Sale 3                                   $0.00
     TargetSpecified Percentage                                                    3Yield Supplement Amount                                   $0.00%                   + Invest. Income                 $4849,197796.0011
     TargetSpecified Reserve Account Balance                                                                       $18,994455,363892.8504          + Excess Serv         Service     $1,409106,894286.9805
     SpecifiedMinimum Yield Supplement Amount                                   Balance                                            $014,999,984.0020          + Transfer (to)                             $0.00
                                                                                                             --------------
     Specified(Release) Yield/ Supplement Amount                                   Deposit                                        ($01,694,553.00            Collections Acct97)
     SpecifiedEnding Reserve Account Balance                                                                       $18,994455,363892.8504            Beginning Balance  $21,005,105.33
     Minimum Balance                                            $1420,999150,984446.20           01
                                                                                      ======================================
     (Release) / Deposit                                        ($2,010,741.48)
     Ending Balance                                             $18,994,363.85

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Current Weighted Average APR:                                           7                                            6.010991%
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Current Weighted Average Remaining Term (months):                        4746.1330
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Delinquencies                                                                                                                Dollars         Notes
                                                       Installments:  1 - 30 days            2,775632,417941.3029    2,903672
                                                                                   31 - 60 days              464377,289194.5067      499446
                                                                                   60+  days                  6492,993961.0650       6682

                                                                     Total:                         3,304103,699097.8646    2,906682
                                                               Balances: 60+  days               1,348685,754164.2275       6682


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Navistar Financial 2004 - B Owner Trust
For the Month of AprilMay 2005
                                                                                                                      NOTES                                                            CLASS B                 CLASS C
                                                          TOTAL               CLASS A - 1     CLASS A - 2         CLASS A - 3         CLASS A - 4        NOTES                     NOTES
                        Original Pool Amount  $750,000,000.00 $113,000,000.00 $240,000,000.00 $183,000,000.00 $169,000,000.00 $26,250,000.00 $18,750,000.00
Original Pool Amount

Distributions:
      Distribution Percentages  (1)              790.0800%          1994.6700%                     0.00%                      0.00%           0          3.7350%         0          2.5250%

      Coupon                                                                       2.2000%         2.7200%                 3.1300%                  3.5300%                 3.3900%               3.9300%

Beginning Pool Bal     $651633,567145,111461.7957
Ending Pool Balance    $633615,145196,461401.5740

Collected Principal     $1817,146360,583376.7963
Collected Interest       $3,779650,486079.6719
Charge - Offs              $275588,066683.4354
Liquidation Proceeds/
     /Recoveries                       $130217,073631.0833

Servicing &
     Administration Fee    $542527,972621.5922
Investment Earnings from
     from Pre-Funding Acct       .           $0.00
Cash Transfer from
     Negative Carry Acct.        $0.00
Cash Transfer from
     Pre-Funding Acct.           $0.00
Cash Transfer from
     Reserve Account             $0.00
Total Collections Avail
     for Debt            Svc       $2120,513700,170465.9593

Beginning Balance      $651633,567145,111461.79  57           $14,567,1110.7900 $240236,000376,000733.0088 $183,000,000.00 $169,000,000.00 $26,250115,000098.0086 $18,750653,000628.0083

Interest Due (2)         $1,681645,625119.75      71           $27,5960.5800     $544535,000787.0026     $477,325.00     $497,141.67     $7473,156775.2515     $61,406090.2563
Interest Paid            $1,681645,625119.75      71           $27,5960.5800     $544535,000787.0026     $477,325.00     $497,141.67     $7473,156775.2515     $61,406090.2563
Principal Due           $1817,421949,650060.22  17           $14,567,1110.79   00  $316,623872,266116.1256           $0.00           $0.00    $134628,901181.14     21    $96448,371762.1740
Mandatory Prepayments
     Class A-1 only              $0.00           $0.00
Principal Paid          $1817,421949,650060.22  17           $14,567,1110.79   00  $316,623872,266116.1256           $0.00           $0.00    $134628,901181.14     21    $96448,371762.1740


Ending Balance         $633615,145196,461401.5740           $0.00 $236219,376504,733617.8832 $183,000,000.00 $169,000,000.00 $2625,115486,098917.8665 $18,653204,628866.8343
Note/Certificate Pool Factor                O0
    (Ending Balance/Original Pool Amt)       0.0000000       0.98490319146026       1.0000000       1.0000000      0.99486099709302      0.99486029709262

Total Distributions     $2019,103594,275179.97  88           $14,594,7080.37   00  $417,167407,266903.1282     $477,325.00     $497,141.67    $209701,057956.3936    $157509,777853.4203

Interest Shortfall               $0.00           $0.00           $0.00                     $0.00                       $0.00          $0.00          $0.00
Principal Shortfall              $0.00           $0.00           $0.00                     $0.00                       $0.00          $0.00          $0.00
           Total Shortfall                         $0.00           $0.00           $0.00                     $0.00                       $0.00          $0.00          $0.00
Excess Servicing (see Memo
           Item - Reserve      Acct   $1,409106,894286.9805

Beginning Reserve
           Acct Balance             $2120,005150,105446.3301
(Release) / Draw        ($21,010694,741553.4897)
Ending Reserve
           Acct Balance             $18,994455,363892.8504

(1)   (a) 100% to the Class A-1 Notes until the Class A-1 Notes are paid in full.  (b) 94.00% of any amount remaining after the
    application of funds in clause (a) to the remaining Class A Notes sequentially until the Class A Notes are paid in full.
    (c) 58.33% of any amount remaining after the application of funds in clauses (a) and  (b) to the Class B Notes until the Class
    Class B Notes are paid in full.  (d) Any amount remaining after the application of funds in clauses (a), (b) and (c) to the 
    Class C Notes
 until the Class C Notes are paid in full.
(2)   Class A-1  Interest based on Actual Number of Days.  Interest on other classes based on a 30
 day month.  Interest   for first 
    settlement based off 28 days, from 11/17/04 to, but excluding, 12/15/04.

(* x represents previously paid interest to other classes.)
(* y represents previously paid interest and principal on other classes.)
==============================================================
Memo Item - Advances:
   Servicer Advances - Current MonthReporting Period   ($53014,275951.1858)
   Total Outstanding Servicer Advances             $2,853838,459507.2668
==============================================================


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Navistar Financial 2004 - B Owner Trust
For the Month of AprilMay 2005

Trigger Events:A)  Loss Trigger
               B)  Delinquency Trigger
               C)  Noteholders Percent Trigger

                                                                               5                                 4                             3               2                               1                             0
                                      Nov-04                                                 Dec-04          Jan-05          Feb-05          Mar-05          Apr-05          May-05

Remaining Gross Balance                     $441,897,747.66   $590,821,805.36   $740,229,491.93 $778,695,303.30 $757,011,197.42 $735,891,003.27 $714,248,420.42

A)   Loss Trigger:
Principal of Contracts Charged Off        $42,639.97       $176,479.01           $166,381.74     $190,472.99     $175,453.84     $275,066.43     $588,683.54
Recoveries                                                                 $0.00           $500.84             $17,760.23           $0.00     $182,678.26     $130,073.08     $217,631.33

Total Charged Off (Months 5, 4, 3)         $385533,500333.7274
Total Recoveries (Months 3, 2, 1)           $200312,438751.4934
                                                                   ----------------
Net Loss / (Recoveries) for 3 Mos           $185220,062582.2340(a)

Total Balance (Months 5, 4, 3)     $12,772109,949746,044600.9559(b)

Loss Ratio Annualized  [(a/b) * (12)]           0.12531255%

Trigger:  Is Ratio > 1.5%                     No
                                                                                          Feb                                                                                     Mar-05          Mar         Apr-05          AprMay-05
B)   Delinquency Trigger:                                                                                                                      $2,346,430.92   $1,622,953.36     $1,348,754.22   $1,685,164.75
     Balance delinquency 60+ days                                                                                                                  0.3013321439%               0.2143918328%        0.1832823594%
     As % of Beginning Pool Balance                                                                                                              0.2627223847%               0.2384723300%        0.2330021120%
     Three Month Average

     Trigger:  Is Average > 2.0%                             No

C)   Noteholders Percent Trigger:                   2.53264608%
     Ending Reserve Account Balance
     not less than 1% of Initial Aggregate
     Receivables Balance

Trigger:  Is Minimum < 1.0%                   No


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Filing Compare · Navistar Financial 2004-B Owner Trust
