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                                                                     Exhibit 4.1
       
                                                                         Annex A
                                                                         -------


                             AEROQUIP-VICKERS, INC.
                                  3000 Strayer
                             Maumee, Ohio 43537-0050


                                January 30, 1999



First Chicago Trust Company of New York
P.O. Box 2535, Suite 4693
Jersey City, New Jersey  07303-2535
Attention:  John G. Herr

                          Re:  Amendment No. 2 to the Rights Agreement
                               ---------------------------------------

Dear Mr. Herr:

                  Pursuant to Section 26 of the Rights Agreement (the "Rights
Agreement"), dated January 26, 1989, as amended, between Aeroquip-Vickers, Inc.
(formerly TRINOVA Corporation) (the "Company") and First Chicago Trust Company
of New York (as successor to National Bank of Detroit), as rights agent, the
Company, by resolution duly adopted by its Board of Directors, hereby amends the
Rights Agreement as follows:


                  1. Section 1(p) of the Rights Agreement is hereby amended by
adding the following new Section 1(pp) immediately thereafter:

                  (pp) "MERGER AGREEMENT" means the Agreement and Plan of
                  Merger, dated as of January 31, 1999, among the Company, Eaton
                  Corporation, an Ohio corporation ("Parent") and Eaton
                  Industries, Inc., an Ohio corporation and a wholly-owned
                  subsidiary of Parent
                  ("Merger Sub").

                  2. Section 1 of the Rights Agreement is hereby amended by
adding the following new paragraph at the end of that Section:

                           Notwithstanding anything in this Agreement to the
                  contrary, none of Parent, Merger Sub, any of their respective
                  Affiliates or Associates or any of their respective permitted
                  assignees or transferees shall be deemed an Acquiring Person
                  and none of a Distribution Date, a Share Acquisition Date, or
                  a Triggering Event



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First Chicago Trust Company of New York
January 30, 1999
Page 2


                  shall be deemed to occur or to have occurred, in each such
                  case, by reason of the approval, execution or delivery of the
                  Merger Agreement, the consummation of the Merger (as defined
                  in the Merger Agreement) or the consummation of the other
                  transactions contemplated by the Merger Agreement.

                  3. The Rights Agreement shall not otherwise be supplemented or
amended by virtue of this Amendment No. 2 to the Rights Agreement, but shall
remain in full force and effect.

                  4. Capitalized terms used without other definition in this
Amendment No. 2 to the Rights Agreement shall be used as defined in the Rights
Agreement.

                  5. This Amendment No. 2 to the Rights Agreement shall be
deemed to be a contract made under the laws of the State of Ohio and for all
purposes will be governed by and construed in accordance with the laws of such
State applicable to contracts to be made and performed entirely within such
State.

                  6. This Amendment No. 2 to the Rights Agreement may be
executed in any number of counterparts and each of such counterparts shall for
all purposes be deemed to be an original, and all such counterparts shall
together constitute but one and the same instrument.

                  7. This Amendment No. 2 to the Rights Agreement shall be
effective as of, and immediately prior to, the execution and delivery of the
Merger Agreement, and all references to the Rights Agreement shall, from and
after such time, be deemed to be references to the Rights Agreement as amended
hereby.




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First Chicago Trust Company of New York
January 30, 1999
Page 3

                  8. Exhibits B and C to the Rights Agreement shall be deemed
amended in a manner consistent with this Amendment No. 2 to the Rights
Agreement.


                                        Very truly yours,

                                        AEROQUIP-VICKERS, INC.


                                        By:  /s/ James E. Kline
                                             --------------------------
                                             Name: James E. Kline
                                             Title: Vice President and
                                                    General Counsel



Accepted and agreed to as of the 
effective time specified above:

FIRST CHICAGO TRUST COMPANY OF NEW YORK


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