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1974 M21 yoke

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Old 05-02-2024, 04:54 PM
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jimh_1962
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Default 1974 M21 yoke

I am looking for any source to get either a new or used yoke for a M21 corvette. This one is for 1.900 at the base. The bearing is 2.020 OD. This one is either a 31/32 spline. The transmission vin matches the car's vin.

Also, if someone has an option to sleeve it then thats okay too.
Old 05-02-2024, 05:09 PM
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4-vettes
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When I needed a yoke for my 77 Super T10 I found one at Zip Corvette's. Perhaps have a look there.
Old 05-03-2024, 07:49 AM
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Rowdy Rat
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Chevrolet changed the manual transmission late in 1974 from a Muncie to Borg Warner (ST10). Not sure if there is a difference in the yokes or which transmission is in your car, but it is worth looking into before you purchase anything.

Regards,

Stan Falenski
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Old 05-03-2024, 09:49 AM
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GTR1999
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I believe the TH400 yoke was the same as the ST-10 if I recall correctly. I think I have one on my shelf to compare.
Old 05-03-2024, 11:28 AM
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jimh_1962
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Originally Posted by Rowdy Rat
Chevrolet changed the manual transmission late in 1974 from a Muncie to Borg Warner (ST10). Not sure if there is a difference in the yokes or which transmission is in your car, but it is worth looking into before you purchase anything.

Regards,

Stan Falenski
This is the Muncie flavor. The VIN on the case matches the vin.


Old 05-03-2024, 11:29 AM
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jimh_1962
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Originally Posted by 4-vettes
When I needed a yoke for my 77 Super T10 I found one at Zip Corvette's. Perhaps have a look there.
No Muncie (GM switched from Muncie to BW Super T-10 was done mid year in 74)


Old 05-03-2024, 02:25 PM
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Mdbirk
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This is a th400

Then there's this one. Both are sitting on my shelf and I was thinking about throwing them on eBay or something
Old 05-03-2024, 02:55 PM
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carriljc
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If it is the same as a turbo 400 yoke here is a part number: Turbo 400 slip yoke 3930827
Old 05-03-2024, 03:01 PM
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GTR1999
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Originally Posted by Mdbirk

This is a th400

Then there's this one. Both are sitting on my shelf and I was thinking about throwing them on eBay or something
Vettes only used strap type slip yokes.
Old 05-03-2024, 03:06 PM
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carriljc
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Look around .... might find a good deal on ebay. you can buy the straps separately too (or you could??) for the turbo 400 yoke 3930827.
So I looked in my archives.
GM part numbers:
Drive Shaft Retainer U Joint Strap:
03882979
U-joint strap bolt:
014018700

And, YES, you can see them on ebay. Hell, you might be able to find them at the gm dealer but I'd check ebay for prices.


https://www.corvettecentral.com/c3-6...26years%3d1974


Last edited by carriljc; 05-03-2024 at 03:20 PM.
Old 05-03-2024, 04:22 PM
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jimh_1962
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Originally Posted by Mdbirk

This is a th400

Then there's this one. Both are sitting on my shelf and I was thinking about throwing them on eBay or something
Its the bottom one. Can you measure the width of the shaft? And is it 32 spline? How much? I think its that one!
Old 05-03-2024, 04:24 PM
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jimh_1962
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Originally Posted by carriljc
Look around .... might find a good deal on ebay. you can buy the straps separately too (or you could??) for the turbo 400 yoke 3930827.
So I looked in my archives.
GM part numbers:
Drive Shaft Retainer U Joint Strap:
03882979
U-joint strap bolt:
014018700

And, YES, you can see them on ebay. Hell, you might be able to find them at the gm dealer but I'd check ebay for prices.


https://www.corvettecentral.com/c3-6...26years%3d1974
We have all of retainers just need a better yoke. A local shop is getting us the rear seal and bushing plus a new gasket kit for the side cover.

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