1971 ls6 double disk clutch - NCRS Discussion Boards

1971 ls6 double disk clutch

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  • Thomas J.
    Expired
    • March 10, 2017
    • 22

    1971 ls6 double disk clutch

    car has m22 with double disk in it, anyone know if this was option or stock for ls6 car or did other cars come with this clutch set up ?
  • Mike E.
    Extremely Frequent Poster
    • February 28, 1975
    • 5138

    #2
    Re: 1971 ls6 double disk clutch

    Stock, only with LS6 and M22 combination.

    Comment

    • Thomas J.
      Expired
      • March 10, 2017
      • 22

      #3
      Re: 1971 ls6 double disk clutch

      thanks for reply

      Comment

      • Mark E.
        Extremely Frequent Poster
        • April 1, 1993
        • 4536

        #4
        Re: 1971 ls6 double disk clutch

        Others know more details, but I believe this clutch was available (or part of the engine option package) with other solid lifter big blocks. Years ago, I had a '70 Chevelle SS L78/375hp with this clutch.

        I believe it's discontinued long ago by GM.
        Mark Edmondson
        Dallas, Texas
        Texas Chapter

        1970 Coupe, Donnybrooke Green, Light Saddle LS5 M20 A31 C60 G81 N37 N40 UA6 U79
        1993 Coupe, 40th Anniversary, 6-speed, PEG 1, FX3, CD, Bronze Top

        Comment

        • Mike E.
          Extremely Frequent Poster
          • February 28, 1975
          • 5138

          #5
          Re: 1971 ls6 double disk clutch

          Fine spline or coarse spline? 71 was fine.

          Comment

          • Terry M.
            Beyond Control Poster
            • September 30, 1980
            • 15599

            #6
            Re: 1971 ls6 double disk clutch

            Originally posted by Thomas Jackson (63380)
            car has m22 with double disk in it, anyone know if this was option or stock for ls6 car or did other cars come with this clutch set up ?
            Stock for your LS6, as Mike said. It was an option with some Corvette engines in 1969 (maybe 1968 also, but I am unsure of that), but not a Corvette option in 1970-1972.
            Terry

            Comment

            • Joe L.
              Beyond Control Poster
              • February 1, 1988
              • 43219

              #7
              Re: 1971 ls6 double disk clutch

              Originally posted by Mark Edmondson (22468)
              Others know more details, but I believe this clutch was available (or part of the engine option package) with other solid lifter big blocks. Years ago, I had a '70 Chevelle SS L78/375hp with this clutch.

              I believe it's discontinued long ago by GM.

              Mark-------


              I have no information that any Chevelle ever was originally equipped with a dual disc clutch. I once was the original owner of a 1968 Chevelle SS 396 with L-78 and M-22. It did not have a dual disc clutch and I do not think that any 1969 or 1970 did, either.
              In Appreciation of John Hinckley

              Comment

              • Joe L.
                Beyond Control Poster
                • February 1, 1988
                • 43219

                #8
                Re: 1971 ls6 double disk clutch

                Originally posted by Terry McManmon (3966)
                Stock for your LS6, as Mike said. It was an option with some Corvette engines in 1969 (maybe 1968 also, but I am unsure of that), but not a Corvette option in 1970-1972.

                Terry------


                The dual disc clutch was used for only 2 Corvette applications ever. The first was 1969 Corvettes with L-71 engine and MA-6 dual disc clutch option. The second was all 1971 Corvettes with LS-6 and 4 speed transmission.
                In Appreciation of John Hinckley

                Comment

                • Joe L.
                  Beyond Control Poster
                  • February 1, 1988
                  • 43219

                  #9
                  Re: 1971 ls6 double disk clutch

                  Originally posted by Mike Ernst (211)
                  Fine spline or coarse spline? 71 was fine.

                  Mike-----

                  1969 with MA-6 used 10 spline discs. 1971 with LS-6 used 26 spline discs. Otherwise, the clutches were the same.

                  Also, I believe that all 1971 with LS-6 and 4 speed transmission, both M-21 and M-22, were equipped with the dual disc clutch.
                  In Appreciation of John Hinckley

                  Comment

                  • Joe L.
                    Beyond Control Poster
                    • February 1, 1988
                    • 43219

                    #10
                    Re: 1971 ls6 double disk clutch

                    Originally posted by Thomas Jackson (63380)
                    car has m22 with double disk in it, anyone know if this was option or stock for ls6 car or did other cars come with this clutch set up ?

                    Thomas-----

                    If you ever need any components of this clutch system you will probably need to convert to a standard single disc clutch. All of the GM parts for this clutch system are long-since GM discontinued and I know of no reproductions or aftermarket replacements for any of the components. Given that the market for these parts is infinitesimal, I highly doubt there will ever be available such parts.

                    Once-in-awhile one or more of the components comes up for sale on eBay at withering prices.
                    In Appreciation of John Hinckley

                    Comment

                    • Mark E.
                      Extremely Frequent Poster
                      • April 1, 1993
                      • 4536

                      #11
                      Re: 1971 ls6 double disk clutch

                      Originally posted by Joe Lucia (12484)
                      Mark-------


                      I have no information that any Chevelle ever was originally equipped with a dual disc clutch. I once was the original owner of a 1968 Chevelle SS 396 with L-78 and M-22. It did not have a dual disc clutch and I do not think that any 1969 or 1970 did, either.
                      I acquired the Chevelle in 1977 with about 75k miles, and sold it a few years later after a garbage truck turned left into the car while I was passing it. I cried that day, even though I wasn't injured. To add insult, the cop wrote me a ticket for unsafe passing. Apparently in California back then, if ANYTHING bad happened while passing, it's your fault. No matter the truck driver didn't signal or even look before turning.

                      I digress. When purchased, the power brake pedal had a custom fitted block mounted on top so its height closely matched the clutch pedal. Oh, the prior owner was about 5' 5" tall and had issues walking. I assumed the clutch was original, but maybe it was installed to reduce effort or travel?

                      Still, I'm surprised you don't think any non-Corvettes came with this clutch.
                      Mark Edmondson
                      Dallas, Texas
                      Texas Chapter

                      1970 Coupe, Donnybrooke Green, Light Saddle LS5 M20 A31 C60 G81 N37 N40 UA6 U79
                      1993 Coupe, 40th Anniversary, 6-speed, PEG 1, FX3, CD, Bronze Top

                      Comment

                      • Dick W.
                        Former NCRS Director Region IV
                        • June 30, 1985
                        • 10483

                        #12
                        Re: 1971 ls6 double disk clutch

                        Possibility that these folks can rebuild the dual disk clutch http://carolinaclutchandbrake.com/ I don't know of anything that has stumped them yet.
                        Dick Whittington

                        Comment

                        • Joe L.
                          Beyond Control Poster
                          • February 1, 1988
                          • 43219

                          #13
                          Re: 1971 ls6 double disk clutch

                          Originally posted by Mark Edmondson (22468)


                          Still, I'm surprised you don't think any non-Corvettes came with this clutch.

                          Mark------


                          I have no information that any other Chevrolet model was ever originally equipped with a dual disc clutch. This includes 1970 with LS-6. The car of which you speak could have been retrofitted with one or it could have been retrofitted with some sort of aftermarket dual disc or other clutch.
                          In Appreciation of John Hinckley

                          Comment

                          • Thomas J.
                            Expired
                            • March 10, 2017
                            • 22

                            #14
                            Re: 1971 ls6 double disk clutch

                            thanks for feed back clutch pressure plate all other parts look great car has 46000 miles on it

                            Comment

                            • Mike E.
                              Extremely Frequent Poster
                              • February 28, 1975
                              • 5138

                              #15
                              Re: 1971 ls6 double disk clutch

                              The flywheel for a MA9-equipped car is unique, also.

                              Comment

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