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Yoke for SM420 to 1/2 torque tube
#1377397 Thu Sep 17 2020 10:26 AM
Joined: Oct 2010
Posts: 215
5
Shop Shark
I have a 1954 1300 with a (SM240) 4-speed.
The bolts for the U-joint worked their way loose and the U-joint came free from the transmission. I did use the proper clip and bent the tabs over, but the bolts came loose anyway.

The yoke is some what mangled. Does anyone know where I have find a replacement yoke?
[img]https://waltwilliams.000webhostapp.com/myImages/ujoint0.jpg[/img]
[img]https://waltwilliams.000webhostapp.com/myImages/ujoint1.jpg[/img]
[img]https://waltwilliams.000webhostapp.com/myImages/ujoint2.jpg[/img]


I could try to working over the yoke in the photo but I don't know if I could ever fully trust it.

Last edited by 54Belair; Fri Oct 02 2020 10:47 PM.
Re: Yoke for SM420 to 1/2 torque tube
54Belair #1377399 Thu Sep 17 2020 10:38 AM
Joined: Sep 2001
Posts: 30,450
ace skiver
Many years ago I bought one from Jim Carter Truck Parts and from Chevs of the 40s.

Your ad in the Swap Meet might get a response.


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: Yoke for SM420 to 1/2 torque tube
54Belair #1377427 Thu Sep 17 2020 03:58 PM
Joined: Jan 2013
Posts: 1,662
S
Shop Shark
They have been kind of hard to find lately, I had an extra but sold it to a guy in the land down under a few months ago. He was on the hunt for one for quite awhile.

Might try these guys , spendy but complete:
https://www.parts123.com/parts123/yb.dll?parta~dyndetail~Z5Z5Z50000014a~Z5Z5Z58622~P349.50~~~~S4IG0OOGLT10889311880d~Z5Z5Z5~Z5Z5Z50000014x


1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
https://www.youtube.com/watch?v=Bli...n05i04t1aokgm4p04jiwgffwhyyih5xbk0h00410
1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration
Re: Yoke for SM420 to 1/2 torque tube
tclederman #1377803 Sun Sep 20 2020 10:02 PM
Joined: Oct 2010
Posts: 215
5
Shop Shark
Jim Carters' used parts department is closed because of "Kung Fu" flu. I suppose I could try again and plead with them.

Walt

Re: Yoke for SM420 to 1/2 torque tube
54Belair #1379912 Wed Oct 07 2020 10:40 PM
Joined: Oct 2010
Posts: 215
5
Shop Shark
Good News

I decided to take the u-joint yoke to a driveline shop to see what they can do. They said that they could recondition the yoke by welding the gouged out spots and make the u-joint bushings seats flat again.
Where I do not seem to have any other option they are currently working on it. I suspect this process will take a day or two.

It will make it so I can bolt the u-joint to the yoke. I will use thread-locker compound and safety-wire it to prevent this from happening again.

Re: Yoke for SM420 to 1/2 torque tube
54Belair #1381649 Wed Oct 21 2020 01:04 PM
Joined: Sep 2009
Posts: 317
G
Shop Shark
Best place to find one of those is in a junkyard. Very hard part to locate. When I did my 3-speed to 4-speed swap in my 3100, that part stopped me dead in my tracks. Luckily, a fellow Stovebolt member picked up a chassis/driveline that had the yoke still intact, and sent the yoke and clips/bolts to me.

Last edited by Green_98; Wed Oct 21 2020 01:05 PM.

-Patrick
1953 Chevrolet 3100
261 / 4-speed / 4:11 / Commercial Red


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