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Mod | | | Forums66 Topics128,180 Posts1,057,167 Members48,465 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2009 Posts: 296 'Bolter | | 'Bolter Joined: Sep 2009 Posts: 296 | Quick explanation:
I'm having an SM420 installed in my stock 3100 to replace the 3-speed column shift, and the rear bearing retainer/bellhousing is too large to connect to my factory torque tube. My question is, were there multiple sizes of bellhousings available? I bought a bellhousing (for torque tube connection) off of ebay and had it installed when I had my SM420 rebuilt by a transmission shop, but now they don't match up with the torque tube.
I am in need of this part for a 1/2 ton if anyone has a lead.
Thanks.
-Patrick
1953 Chevrolet 3100
261 / 4-speed / 4:11 / Commercial Red
| | | | | Joined: Feb 2004 Posts: 29,875 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,875 | Would it be possible to use the ball end of the torque tube that fits your bearing retainer on the existing torque tube? Just a wild guess, but I'll bet the SM 420 used a different ball than the 3 speed. I've got a 51 GMC frame stashed away that had a 420 in it and the torque tube is still there. I'll get some photos and measurements as soon as I get back from a trip to Nashville.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Sep 2009 Posts: 296 'Bolter | | 'Bolter Joined: Sep 2009 Posts: 296 | Jerry helped me clarify what I need. What I need is the output flange/yoke for the torque tube 4-speed SM420 transmission, and also the U-joint for it. Anyone have one?
-Patrick
1953 Chevrolet 3100
261 / 4-speed / 4:11 / Commercial Red
| | | | | Joined: Jul 2014 Posts: 1,293 Moderator for Tons o' Fun , Co-Moderator Driveline Forum | | Moderator for Tons o' Fun , Co-Moderator Driveline Forum Joined: Jul 2014 Posts: 1,293 | You might try posting your request in the Swap Meet, "Truck parts wanted" . That way a lot more folks will see your request.
Ron - - Dusty53 1954 Chevy 3604In the Gallery Forum "You can't dance with the Devil and then wonder why you're still in Hell."
"They will forget what you've said, and they will forget what you have done but they will never forget the way you made them feel." | | |
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