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Joined: Feb 2021
Posts: 86
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'Bolter
'Bolter
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Posts: 86
Folks, my 50 ute has a closed torque tube which feeds the diff, is there a kit that i can use to keep existing transmission and go to an open torque tube and open diff

Probably been asked a thousand times I am sure, could not find the correct search words

Steve

Joined: Mar 2010
Posts: 10,272
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Renaissance Man
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Nope. Yours is only the 857th request for that information. We generally shut down conversations of topics after the 1,000th one. smile
Someone more knowledgeable than me will be along soon to give you specific information about how to modify your torque tube transmission to accept an open driveshaft.


1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
Joined: Mar 2010
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Curmudgeon
Curmudgeon
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No kits. Most going to open differential switch the transmission out as well and customize a driveshaft to length. To keep the 3 on-the-tree you could go to a open tube Saginaw 3 speed.

Just an idea as an option, but it may not be practical, look at the construction of a 47-54 3/4 ton truck drivetrain.
2 piece driveshaft with a section closed and section open. It could be customized but the results would need to be rebalanced at a driveshaft shop.

In the end, it may be more cost effective to install an "Oakie Bushing" and seals in what you already have.


"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."
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'Bolter
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GM has solved the problem for you with the 3/4T AD Trucks which have a torque tube from transmission to center hanger bearing and then an open driveshaft from hanger bearing to rear end.

Last edited by coilover; 02/14/2022 4:40 PM.

Evan
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'Bolter
'Bolter
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Originally Posted by coilover
GM has solved the problem for you with the 3/ AD Trucks which have a torque tube from transmission to center hanger bearing and then an open driveshaft from hanger bearing to rear end.

I have not seen this setup, sounds perfect for what I am after

Steve

Joined: Jan 2022
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'Bolter
'Bolter
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... but you'll need a crossmember to hang 18.0650 from. This drawing is from a GMC Master Parts Book, but the parts are the same as Chevy used on 3/4 and 1 ton trucks.
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'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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'Bolter
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Since you're a few thousand miles away, it's kind of hard to give good advice. LOL. I don't know what type of GM trucks were available in Australia, but from a little research, I found that Holden did use Muncie 4 speeds, like their American counterparts. The Holden Commodore V8 did also use a T5 transmission at one point too, which had the Muncie style bolt pattern. It looks like the V6 commodore used the Ford style bolt pattern. The early Toyota FJ used the Muncie style transmission too, but had different front bearing sizes and throw out bearing sizes were different, so it might be a pain getting them to work correctly.

For an open driveline rearend, I would look for a Toyota rear diff. Here in the states, the 95-05 Tacoma is about the perfect width and the 4wd axles were 6 bolt wheel pattern.

Look around for some Hot Rod shops or 4wd clubs, they can probably point you in the right direction.


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Insomniac
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All: Before you post in this thread, you might want to review this post: https://www.stovebolt.com/ubbthreads/ubbthreads.php/topics/1395810/australia-hello.html#Post1395810

I converted to a 2 piece open driveshaft. However, I have a pickup truck and I don't think my solution will work with your ute.

Last edited by Gord&Fran; 02/13/2022 7:34 PM.

Gord 🇨🇦
----
1954 1/2 ton 235 4 speed
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'Bolter
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So after lots of reading and research, looking at buying this adaptor kit or a similiar one that fits to the back of a stovebolt motor and allows a semi modern auto transmission to be fitted up.

Can anyone give me pros and cons of which is better, I have got myself a chev 10 bolt diff with 4 link suspension fitted to it that will fit my ute, so adaptor plate and then transmission choice
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Last edited by Simso; 02/19/2022 10:58 AM.

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