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Can you tell me where I can source a new or used yoke for a C3 corvette? My son's 74 corvette which has matching VIN transmission needs either re-sleeved yoke or replace it. This is supposed to be a M21 but I think the tail shaft is out of M22. The OD for the bushing is 2.020. The base of the yoke measured 1.985 or something around that. I know it will need a new seal and bushing. Does that sound like this is a M21 or M22 rear tail shaft? O(r is it just 1974 corvettes used a heaver diameter yoke? I just want to make sure I get the right part or if I can get away with just sleeving it... I guess the other option is to take it to a machine shop and build it up back to the correct specs since the base of the yoke is the correct OD. I know the bushing or bearing had GM F-11 on the outside.
Sorry, I wrote this thread in C1/C2 but I figured it would be the best way to get Tom's response than to send a PM.
I don’t recall there being any difference in the M20, M21 and M22 main shafts for a given year. When I built my M22W a few years ago I reused my M20 main shaft with the new M22W gears, sliders, etc. A 70 and later Muncie has a 32 spline count for the yoke while earlier versions had a 27 spline count. I believe the 32 spline, later shaft is a bit larger in diameter at the yoke.
I don’t recall there being any difference in the M20, M21 and M22 main shafts for a given year. When I built my M22W a few years ago I reused my M20 main shaft with the new M22W gears, sliders, etc. A 70 and later Muncie has a 32 spline count for the yoke while earlier versions had a 27 spline count. I believe the 32 spline, later shaft is a bit larger in diameter at the yoke.
Yep. I just want to figure out what to do with this one or find a good used one. You can see how much its worn down.
Dang man ! I took a quick look on ebay and there are several listed.
Yeah, but I need to know if the size is going to work. Also, I am not looking to spend 200.00 just to find out it will not work. I just want to verify the correct size and make sure its gonna work before paying out.
All 70's Corvettes except the 76-81 with the Turbo 350 used the same 31 spline slip yoke. The correct one is available from most if not all of the Corvette vendors.
All 70's Corvettes except the 76-81 with the Turbo 350 used the same 31 spline slip yoke. The correct one is available from most if not all of the Corvette vendors.
Time to call Keen. I like those people. They brought parts to me when I was in a pinch at a corvette show in Chicago are (rosemont). That was years ago.
I have a used one I'll sell for $80 shipped in US.
Measures 1.884" around the barrel. There is a very light grove that can be felt that I suspect is from seal wear. Very hard to measure but I'd say no more than .002 deep.
05-02-2024, 06:52 PM
DZAUTO Yoke questions
