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Joined: Jan 2006
Posts: 3
B
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I have a 1950 3100 that has a 4 speed. I want to change it to a 3 speed column shifter which I have. Does anyone know if the torque tube is OK on length regardless of which tranny you bolt up? I am also converting the 411s to 355s...does anyone have a preference on where to buy the 355s for the best price?

Thanks,
Big Caddy

Joined: Oct 2003
Posts: 5,152
O
Cruising in the Passing Lane
Cruising in the Passing Lane
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Hi Big Caddy, welcome to the Stovebolt!

I don't know the answer to your question, but I think there was more than one torque tube length. Maybe my response will move your question up higher and someone who knows will respond.

Where in the Seattle area are you? I know where there is a '52 GMC a ferry ride from Seattle that is now missing its 3-speed that you could probably get the torque tube from pretty friendly.


1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
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It should be a bolt in replacement, I just did the opposite, 3 speed to a 4 speed, everything bolted right back up.

Joined: Sep 2001
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Bubba - Curmudgeon
Bubba - Curmudgeon
Joined: Sep 2001
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Big Caddy,

All Advance-Design 3-speed and 4-speed torque-tube transmissions are the same length.

The only Advance-Design torque-tube transmission that has a different length (longer) is the 1954 1/2 ton Hydra-Matic. As a result, the Hydra-Matic torque-tube is shoter than manual transmission torque-tubes.

Tim

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Thanks, Tim!!!! When you have three trucks to make one, interchangeability is kinda critical! And I would hate to spend the money rebuilding the 4:11s from the 4-speed rearend to 3:55s only to find that the tube doesn't marry up to the 3-speed....

Big Caddy

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Thanks, Hillbilly - that is the beauty of this site...always somebody been there, done that!

Big Caddy

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One last thought...any difference in the bell housing bolt pattern for the for the two trannys?

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Cruising in the Passing Lane
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no difference

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
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Hi Big Caddy,I Have a 53 3100 and want to install a 4 speed and remove my 3 speed.Thank for your posting,now I have some answers to my questions.If you are going to sell yiur 4 speed PLEASE post it on this site.Thank you again


Mr.Giant

1953 Chevrolet 3100 in the Gallery
1959 GMC 860 Single Axle Truck Tractor in the Gallery

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