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Universal Joint Assembly for SM420 in a 1/2 ton
#1354731 Sun Apr 12 2020 05:14 AM
Joined: Sep 2007
Posts: 421
R
Shop Shark
Looking for U joint assembly (Front yoke, rear yoke and ball housing) to put an SM420 into a '47 1/2 ton. These parts will fit '48 to '54 1/2 tons. Apparently, hen's teeth may be easier to find, but I though I'd post to see if anyone has any of these parts (particularly the front yoke) lying around. I have a torque tube from a later 1/2 ton so SM420 transmission and torque tube length should not be a problem. Thanks.


It's a small world, but I wouldn't want to paint it.
Re: Universal Joint Assembly for SM420 in a 1/2 ton
Rusty Shackleford #1354814 Sun Apr 12 2020 06:45 PM
Joined: Mar 2011
Posts: 1,509
J
Shop Shark
Here is a SM420 transmission.
Zach (443) 907-7131
Listing is in the eBay, CL forum under; SM420 transmisions and PTOs

It is an older ad, so if you're interested I would call soon.

The transmission has the rear bearing retainer cover for the torque tube and what looks like a 1/2 ton front yoke w/attaching bolt.
Maybe the guy would make a deal for both.
All can do is ask, the worst he can say is no.

All you would need after that would be rear yoke, trunnion & ball housing with 4 bolt hole ball collar.
http://chevy.oldcarmanualproject.com/1929_57chevyparts/57cmpc0341.htm

Attached Files
sm420 ujoint.jpg (122.28 KB, 182 downloads)
sm420 ujoint.jpg (176.68 KB, 175 downloads)
Re: Universal Joint Assembly for SM420 in a 1/2 ton
Rusty Shackleford #1354829 Sun Apr 12 2020 07:54 PM
Joined: Mar 2011
Posts: 1,509
J
Shop Shark
JEEP Cj, YJ PARTS
Munci SM420 transmission. $200
Munci SM 420 transmission case. $50

Check 2nd picture from the left shows a SM420 with a retainer cover for torque tube.
Can't see if there is a front yoke.

Listing is in the eBay, CL forum under; SM420 transmisions and PTOs

Re: Universal Joint Assembly for SM420 in a 1/2 ton
Rusty Shackleford #1356199 Mon Apr 20 2020 04:42 AM
Joined: Sep 2007
Posts: 421
R
Shop Shark
I found the parts I need. Now the fun begins to get the transmission rebuilt. Thanks for your input.


It's a small world, but I wouldn't want to paint it.
Re: Universal Joint Assembly for SM420 in a 1/2 ton
Rusty Shackleford #1370908 Mon Jul 27 2020 09:18 PM
Joined: Jan 2019
Posts: 1
S
Moderated
where did you find the parts? I need a U-joint assembly, specifically the front pinion yolk for a 4 speed 1/2T. This is for a torque tube application. any help would be appreciated. See image.
https://www.fillingstation.com/images_product/large/fs-683.jpg

Last edited by Tiny; Mon Jul 27 2020 09:28 PM.
Re: Universal Joint Assembly for SM420 in a 1/2 ton
Rusty Shackleford #1371507 Fri Jul 31 2020 05:06 PM
Joined: Sep 2007
Posts: 421
R
Shop Shark
I searched Craigslist and found a guy selling a transmission for a good price. I didn't want to pay to ship a transmission from Florida to northwest Washington so I paid for the whole transmission and the seller agreed to ship the parts I needed which fit in a USPS medium-size, flat-rate box. This worked as the transmission was relatively cheap.


It's a small world, but I wouldn't want to paint it.

Moderated by  Tiny 

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