<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>ryder4.txt
<DESCRIPTION>RYDER GET OUT FILING AMD #4
<TEXT>

                    SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G


                                 (Rule 13d-102)


             INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2


                   Under the Securities Exchange Act of 1934
                               (Amendment No. 4 )

                               Ryder System, Inc.
             -----------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
              -----------------------------------------------------
                         (Title of Class of Securities)

                                    783549108
             -----------------------------------------------------
                                 (CUSIP Number)



Check the following box if a fee is  being paid with this statement [ ].


----------
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

<PAGE>

CUSIP No.783549108                    13G                    Page 2  of 8  Pages



--------------------------------------------------------------------------------
   1.  NAME OF REPORTING PERSON(S)
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON(S)

          Morgan  Stanley Dean  Witter &  Co.
          IRS  #  39-314-5972



--------------------------------------------------------------------------------
   2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a)  [  ]
                                                             (b)  [  ]


--------------------------------------------------------------------------------
   3.  SEC USE ONLY




--------------------------------------------------------------------------------
   4.  CITIZENSHIP OR PLACE OF ORGANIZATION

          The state of organization is Delaware.


--------------------------------------------------------------------------------
   NUMBER OF      5.   SOLE VOTING POWER
     SHARES            0
  BENEFICIALLY    --------------------------------------------------------------
    OWNED BY      6.   SHARED VOTING POWER
      EACH             763,586
   REPORTING      --------------------------------------------------------------
     PERSON       7.   SOLE DISPOSITIVE POWER
      WITH             0
                  --------------------------------------------------------------
                  8.   SHARED DISPOSITIVE POWER
                       775,336
--------------------------------------------------------------------------------
   9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         775,336

--------------------------------------------------------------------------------
  10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*



--------------------------------------------------------------------------------
  11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

          1.3%

--------------------------------------------------------------------------------
  12.  TYPE OF REPORTING PERSON*

          IA, CO

--------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

CUSIP No. 783549108                   13G                    Page 3  of 8  Pages



--------------------------------------------------------------------------------
   1.  NAME OF REPORTING PERSON(S)
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON(S)

          Morgan Stanley Dean Witter Advisors Inc.
          IRS # 13-3680016

--------------------------------------------------------------------------------
   2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a)  [  ]
                                                             (b)  [  ]


--------------------------------------------------------------------------------
   3.  SEC USE ONLY




--------------------------------------------------------------------------------
   4.  CITIZENSHIP OR PLACE OF ORGANIZATION

          The state of organization is Delaware.


--------------------------------------------------------------------------------
   NUMBER OF      5.   SOLE VOTING POWER
     SHARES            0
  BENEFICIALLY    --------------------------------------------------------------
    OWNED BY      6.   SHARED VOTING POWER
      EACH             633,637
   REPORTING      --------------------------------------------------------------
     PERSON       7.   SOLE DISPOSITIVE POWER
      WITH             0
                  --------------------------------------------------------------
                  8.   SHARED DISPOSITIVE POWER
                       645,387
--------------------------------------------------------------------------------
   9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          645,387

--------------------------------------------------------------------------------
  10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*



--------------------------------------------------------------------------------
  11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

          1.08%

--------------------------------------------------------------------------------
  12.  TYPE OF REPORTING PERSON*

          IA, CO

--------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>


CUSIP No. 783549108                   13G                   Page 4  of  8  Pages





Item 1.     (a)   Name of Issuer:
                  Ryder System, Inc.
                  --------------------------------------------------------------
            (b)   Address of Issuer's Principal Executive Offices:
                  3600 N.W. 82nd Avenue
                  Miami, FL 33166
                  --------------------------------------------------------------
Item 2.     (a)   Name of Person Filing:
                  (a)  Morgan Stanley Dean Witter & Co.
                  (b)  Morgan Stanley Dean Witter Advisors Inc.
                  --------------------------------------------------------------
            (b)   Address of Principal Business Office, or if None, Residence:
                  (a)  1585 Broadway
                       New  York, New  York  10036

                  (b)  Two World Trade Center
                       New  York, New  York  10048
                  --------------------------------------------------------------
            (c)   Citizenship:
                           Incorporated by reference to Item 4 of the cover page
                           pertaining to each reporting person.

                               -------------------------------------------------
            (d)   Title of Class of Securities:
                           Common Stock
                  --------------------------------------------------------------
            (e)   CUSIP Number:
                           783549108
                               -------------------------------------------------

Item 3.        (a)  Morgan  Stanley  Dean  Witter  & Co.  is  a  parent holding
                    company.

               (b)  Morgan   Stanley  Dean  Witter   Advisors  Inc.  is  (e)  an
                    Investment  Adviser  registered  under  Section  203  of the
                    Investment Advisers Act of 1940.

<PAGE>

CUSIP No.783549108                   13-G                   Page 5  of  8  Pages



Item 4.     Ownership.

               Incorporated by reference to Items (5) - (9) and (11) of the
               cover page.

Item 5.     Ownership of Five Percent or Less of a Class.
            (a)     As of the date hereof,  Morgan Stanley Dean Witter & Co. has
                    ceased to be the beneficial  owner of more than five percent
                    of the class of securities.

            (b)     As of the date hereof,  Morgan Stanley Dean Witter  Advisors
                    Inc. has ceased to be the beneficial owner of more than five
                    percent of the class of securities Inapplicable


Item 6.     Ownership of More Than Five Percent on Behalf of Another Person.

                Inapplicable

Item 7.     Identification and Classification of the Subsidiary which Acquired
            the Security Being Reported on By the Parent Holding Company.


Item 8.     Identification and Classification of Members of the Group.


Item 9.     Notice of Dissolution of Group.


Item 10.    Certification.

               By signing below I certify that, to the best of my knowledge and
               belief, the securities referred to above were acquired in the
               ordinary course of business and were not acquired for the purpose
               of and do not have the effect of changing or influencing the
               control of the issuer of such securities and were not acquired in
               connection with or as a participant in any transaction having
               such purpose or effect.

<PAGE>
CUSIP No.783549108                    13-G                   Page 6  of  8 Pages


                                   Signature.


            After reasonable inquiry and to the best of my knowledge and belief,
            I certify that the information set forth in this statement is true,
            complete and correct.


Date:       May 10 2001


Signature:  /s/ Dennine Bullard
            -----------------------------------------------------------------

Name/Title  Dennine Bullard / Vice President Morgan Stanley & Co. Incorporated
            -----------------------------------------------------------------
            MORGAN STANLEY DEAN WITTER & CO.


Date:       May 10, 2001

Signature:  /s/ James Wallin
            -----------------------------------------------------------------

Name/Title  James Wallin / First Vice President Morgan Stanley Dean Witter
                         Advisors Inc.
            -----------------------------------------------------------------
            MORGAN STANLEY DEAN WITTER ADVISORS INC.



                       INDEX TO EXHIBITS                                 PAGE
                       -----------------                                 ----
EXHIBIT 1       Agreement to Make a Joint Filing                          7

EXHIBIT         2 Secretary's Certificate Authorizing Dennine Bullard 8 to Sign
                on behalf of Morgan Stanley Dean Witter & Co.


* Attention. Intentional misstatements or omissions of fact constitute federal
  criminal violations (see 18 U.S.C. 1001).

(022597DTI)
EX-99.1
JOINT FILING AGREEMENT

Cusip No. 783549108                      13G                   Page 7 of 8 Pages


                            EXHIBIT 1 TO SCHEDULE 13G
       ------------------------------------------------------------------


                                  MAY 10, 2001
       ------------------------------------------------------------------



               MORGAN  STANLEY DEAN WITTER & CO. AND MORGAN  STANLEY DEAN WITTER

               ADVISORS  INC. hereby  agree  that,  unless differentiated,  this

               Schedule 13G is filed on behalf of each of the parties.


          MORGAN STANLEY DEAN WITTER & CO.

BY:       /s/ Dennine Bullard
           ---------------------------------------------------------------------
          Dennine Bullard / Vice President Morgan Stanley & Co. Incorporated


          MORGAN STANLEY DEAN WITTER ADVISORS INC.

BY:       /s/ James Wallin
           --------------------------------------------------------------------
          James Wallin  /  First Vice President Morgan Stanley Dean Witter
                         Advisors Inc.

EX-99
SECRETARY'S CERTIFICATE





                                                             Page 8  of 8  Pages
                                  EXHIBIT 1                  -------------------

                 MORGAN STANLEY, DEAN WITTER, DISCOVER & CO.

                             SECRETARY'S CERTIFICATE




 I,      Charlene R. Herzer, a duly elected and Assistant Secretary of Morgan
         Stanley Dean Witter & Co., a corporation organized and existing under
         the laws of the State of Delaware (the "Corporation"), certify that
         Stuart J.M. Breslow, Robert G. Koppenol and Dennine Bullard are
         authorized to sign reports to be filed under Sections 13 and 16 of the
         Securities Exchange Act of 1934 (the "Act") pursuant to the following:
             (1)      On May 31, 1997, the Board of Directors of the Corporation
                      granted authority to Stuart J.M. Breslow and Robert G.
                      Koppenol to sign reports to be filed under Sections 13 and
                      16 of the Act on behalf of the Corporation.

             (2)      On February 23, 2000, Donald G. Kempf, Jr., the Executive
                      Vice President, Chief Legal Officer and Secretary of the
                      Corporation, delegated authority to Dennine Bullard to
                      sign reports to be filed under Sections 13 and 16 of the
                      Act on behalf of the Corporation. Pursuant to Section 7.01
                      of the Bylaws of the Corporation and resolutions approved
                      by the Board of Directors of the Corporation on September
                      25, 1998, the Chief Legal Officer is authorized to enter
                      into agreements and other instruments on behalf of the
                      Corporation and may delegate such powers to others under
                      his jurisdiction.

          IN WITNESS WHEREOF, I have hereunto set my name and affixed the seal
          of the Corporation as of the 1st day of March, 2000.

                                                ------------------------------
                                                Charlene R. Herzer
                                                Assistant Secretary



</TEXT>
</DOCUMENT>
