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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: May 2009 Posts: 26 Apprentice | | Apprentice Joined: May 2009 Posts: 26 | I have a 52 half ton that I am rebuilding. I am swapping the 216 for a 235 out of a 57. While its apart I'd like to swap out the 3 spd column shift for a 4 spd on the floor. I want to keep the stock torque tube driveline. What year(s) tranny will bolt up? Thanks | | | | | Joined: Feb 2006 Posts: 150 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 150 | I think your only choice is a sm420 up to 1954. Good luck, you shouldn't have any problem locating one of them. | | | | | Joined: Sep 2001 Posts: 29,270 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 |
Any SM420 should bolt up, as long as you have the torque-tube rear cover for the transmission. You'll also need a 4-speed torque-tube u-joint (and speedometer drive-gear and driven gear).
Tim
| | | | | Joined: Aug 2006 Posts: 21 'Bolter | | 'Bolter Joined: Aug 2006 Posts: 21 | Patrick Dykes makes a conversion kit for about $500 that lets you put a modern saginaw trans into the orig driveline and keep the torque tube.
Vendor and manufacturer of the No name, No fin, No logo cast aluminum 216/235/261 Valve cover and Hold Down Knobs
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