
                     SECURITIES AND EXCHANGE COMMISSION
                           WASHINGTON, D.C. 20549
                         ________________________

                                 FORM 8-K/A

                             AMENDMENT NO.1 TO
                               CURRENT REPORT

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

     Date of Report (Date of earliest event reported): October 6, 1998

                              SPX Corporation
           (Exact name of registrant as specified in its charter)


                                    
        Delaware                   1-6948                  38-1016240
(State of incorporation)  (Commission File Number)       (IRS Employer
                                                       Identification No.)



  700 Terrace Point Drive, Muskegon, Michigan                49443-3301
   (Address of principal executive offices)                  (Zip Code)



Registrant's telephone number, including area code: (616) 724-5000


<PAGE>


The  undersigned  registrant  hereby amends its Current  Report on Form 8-K
filed with the Securities  and Exchange  Commission on October 9, 1998 (the
"Form 8-K") as set forth below:

Item 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL
         INFORMATION AND EXHIBITS

         (a)      Financial Statements

                  The Report of Independent  Auditors and the  accompanying
                  Financial Statements set forth in General Signal's Annual
                  Report on Form 10-K for the fiscal  year  ended  December
                  31,  1997  and the  Financial  Statements  set  forth  in
                  General  Signal's  Quarterly  Report on Form 10-Q for the
                  quarter  ended  June 30,  1998  are  attached  hereto  as
                  Exhibits   99.3   and   99.4,   respectively,   and   are
                  incorporated herein by reference.

         (b)      Pro Forma Financial Information

                  The unaudited pro forma condensed combined financial data
                  of SPX and General Signal set forth in Amendment No. 1 to
                  Form  S-4  filed  with  the   Securities   and   Exchange
                  Commission  on September  3, 1998 are attached  hereto as
                  Exhibit 99.5 and are incorporated herein by reference.

         (c)      Exhibits

                  The following Exhibits are hereby added to the Form 8-K:

                  Exhibit 23    Consent of Ernst & Young

                  Exhibit 99.3  Report   of   Independent    Auditors   and
                                accompanying Financial Statements set forth
                                in General  Signal's  Annual Report on Form
                                10-K for the fiscal year ended December 31,
                                1997

                  Exhibit 99.4  Financial  Statements  set forth in General
                                Signal's  Quarterly Report on Form 10-Q for
                                the quarter ended June 30, 1998

                  Exhibit 99.5  Unaudited  pro  forma  condensed   combined
                                financial  data of SPX and  General  Signal
                                set  forth in  Amendment  No. 1 to Form S-4
                                filed  with  the  Securities  and  Exchange
                                Commission on September 3, 1998

<PAGE>

                                 SIGNATURES

          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 hereunto duly authorized.

                                    SPX CORPORATION
                                    (Registrant)


                                    By:  /s/Patrick J. O'Leary
                                        -----------------------------------
                                          Patrick J. O'Leary
                                          Vice President-Finance, Treasurer
                                             and Chief Financial Officer

Date:  November 5, 1998

