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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: Apr 2013 Posts: 144 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2013 Posts: 144 | I thought my '53 GMC had been converted to floor shift, but upon closer inspection unsure. There are 2 small holes on top of steering mast with nothing bolted into them, but the trans cover is missing and I can see the shifter is mounted to the actual trans and it would see stock. it is a 3100 SWB half ton w/what I guess is stock 228. Valve cover is GMC and door plate says 90 horse. what is throwing me is shifter, it looks like metal T handle at top with a black button that doesn't push on driver side thumb, anyone have picture of stock GMC or Chevy floor shift for 4 speed? It's still all connected to torque tube and stock rear and atill 6 volt. Would say barn find, but it's woods find. We chainsawed and log chained/4 wheel drive to get some trucks out of the heavy woods. | | | | | Joined: Jun 2011 Posts: 1,901 Shop Shark | | Shop Shark Joined: Jun 2011 Posts: 1,901 | What ever it is it's not original... No T handles with buttons.
Give me ambiguity
or give me something else
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | " . . . looks like metal T handle at top with a black button that doesn't push on driver side thumb . . .
. . . It's still all connected to torque tube and stock rear . . . "If the shift rod goes into the top of the transmission and the transmission is connected to the original torque-tube, it is most likely an SM420 4-apeed with an exotic shift handle. 4-speed with upon-rear u-joint yoke | | | | | Joined: Dec 2004 Posts: 1,897 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 1,897 | Is it possible he has a pre 1948 transmission in there with the reverse lockout lever? | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
If it has a pre-48 transmission, would it have to have a matching rear-end/torque-tube (weren't the earlier transmissions different lengths compared to the later transmissions)?
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