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| | | | Joined: Apr 2001 Posts: 31 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2001 Posts: 31 | Does anyone know if the torque tube length from a 51 truck is the same or longer that a 37 truck? What other challenges are there as far a mounting when placing a 51 rear under a 37 truck?
Thanks for the help!
Mike j
Mike J 37 GMC
| | | | | Joined: Aug 2004 Posts: 1,418 ODSS Lawman | | ODSS Lawman Joined: Aug 2004 Posts: 1,418 | I have put a 51 rear under a 40 one ton GMC. I think you need to check the master parts book (can be found online) to double check, but I think the TT will need to be shortened. The other issue can be spline count on the input shaft versus the transmission. That can be easily overcome by using 2 u-joints and making them into one with two differnet spline counts on a given end.
To further help, is this truck short or long bed? What is your transmission?
SWEET Sergeant At Arms: Old Dominion Stovebolt Society BUNS?!?!?!Where we're going, we don't need no buns.....1950 GMC 450 1951 Chevy 1/2-TonThe GreenMachineIn the Stovebolt Gallery | | | | | Joined: Apr 2001 Posts: 31 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2001 Posts: 31 | Short bed.
3 spd 37 trans.
I need to find the parts to make the u joint with the two different splines.
Mike J.
Mike J 37 GMC
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | I need to find the parts to make the u joint with the two different splines. I addressed this in a private message to you that you have not read.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Sep 2003 Posts: 1,820 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 1,820 | I'm curious as to why you want to make this change? What are you trying to accomplish?
"Truckin' Around .......... Since 1937!" My name is Joe and I am addicted to Classic Country Music. I just can't hep myself.Operators are standing by to take your calls! Now cruising in the Passing Lane | | | | | Joined: Apr 2001 Posts: 31 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2001 Posts: 31 | My understanding is that I can't upgrade the 37 rear to the 3.55 gears.
Mike J.
Mike J 37 GMC
| | | | | Joined: Sep 2003 Posts: 1,820 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 1,820 | Yes, Sir, but I'm not sure that a 51 truck has a 3:55 geared rear end. A 51 car with a Power Glide rear axle would be a 3:55 gear, but I think the truck is a 4:11. I could be wrong.....
"Truckin' Around .......... Since 1937!" My name is Joe and I am addicted to Classic Country Music. I just can't hep myself.Operators are standing by to take your calls! Now cruising in the Passing Lane | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | I believe he is looking into using Patrick's 3.55 conversion for 1/2 ton trucks.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Apr 2001 Posts: 31 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2001 Posts: 31 | Yes I am.
I have not been able to locate a 49 to 54 powergluide car rear. It seems like the next logical step is to find one to upgrade.
I am between upgrading the rear and doing a T5 swap. That would however significantly change my otherwise stock truck.
It seems many have done the rear upgrade only to later change to a T5. Any experience on this would be appreciated.
Mike J 37 GMC
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