I have a very original untouched 1970 454 4-speed the clutch slips so i bought a new one the only one listed for a 1970-1974 454 is a 11" 26 spline i get the old one out and start looking everything over the vin is on the trans like i knew it would be but i start comparing the disc and the old one has a 10 tooth spline but everyone i talked to said a 1970 454 takes a 11" 26 spline how could this be. thanks for the input in advance don.
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Re: 1970 clutch ?
Don-----
Everyone that you talked to are wrong. 1970 Corvettes with Muncie 4 speed all used a 10 spline input shaft and, consequently, a 10 spline clutch disc. 1971 to 1974 Corvettes with Muncie DID use a 26 spline input, though.
For 1970, Chevelles and Camaros with 454 and M-22 did use the 26 spline input (M-22's were converted to 26 spline befopre the other Muncie variants). It's also possible that some 1970 Chevelles and Camaros with 454 and M-21 used the 26 spline input. For 1970 Corvettes, though, all used the 10 spline input.In Appreciation of John Hinckley -
Joe ?
Joe Have you looked at some of hte parts books from corvette central and Zip products they only have a listing for 70 to 74 454 11" 26 spline is that weird or what?Comment
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Re: Joe ?
Don------
With respect to Corvette clutches, there is a lot of incorrect information out there. This has been the case for a long while and originates from the clutch manufacturers incorrect application information. I don't know why thay have not corrected it.
For Corvettes (as well as the vast majority of other Chevrolet cars), input shafts for 1970 and older were all 10 spline. There were the few 1970 exceptions that I noted. Is it possible that some very late 1970 Corvettes got the 26 spline inputs? Yes, it's possible, but it certainly wasn't typical, if it occurred, at all.
Most all 1971 and later Corvettes with 4 speed used 26 spline inputs. But, there were exceptions. 1978-79 Corvettes with "Muncie" 4 speed (actually, a version of the old Saginaw 4 speed transferred to the Muncie, IN plant for manufacture) used the 10 spline input.In Appreciation of John HinckleyComment
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Re: Joe ?
Don,
Joe is correct. My late-build (July 1970) 454 with M-21 is the 10-spline variety as Joe described.TonyComment
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