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Re: 1950 Chevy PU Torque Tube Disconnect
MikeA777 #1382067 Sat Oct 24 2020 06:33 PM
Joined: Mar 2020
Posts: 68
M
Wrench Fetcher
Alright, I was able to pull the engine. Thank goodness I was doing that anyway. The back half of the universal joint slid off the torque tube. Turns out the front portion is bolted to the transmission through the center of the U bolt assembly. It came off easily with a 3/4" socket. Apparently there is no way to pull the transmission or replace the clutch without pulling either the engine or rear end. That's crazy. I have to be missing something. Will post pics after my phone recharges.

Re: 1950 Chevy PU Torque Tube Disconnect
MikeA777 #1382075 Sat Oct 24 2020 07:35 PM
Joined: Jan 2001
Posts: 5,028
P
Master Gabster
That U joint comes apart by pulling the small wire rings, then the bushings pull out.
That joint was never used on 1/2 tons originally.


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Re: 1950 Chevy PU Torque Tube Disconnect
Pre '68 Dave #1382091 Sat Oct 24 2020 09:32 PM
Joined: Mar 2011
Posts: 1,509
J
Shop Shark
Originally Posted by Pre '68 Dave
That U joint comes apart by pulling the small wire rings, then the bushings pull out.
That joint was never used on 1/2 tons originally.

I agree with Pre '68 Dave, that type of u-joint was never used on 1/2 tons originally.
I don't think you can get that type of u-joint to come apart while its still bolted to the tranny's main output shaft.
There doesn't look like there is enough room to slide the bearings over enough to remove them.The rear tranny housing is in the way.

The original 1/2 ton used cap screws with lock plates.
illustration [chevy.oldcarmanualproject.com]

That type of u-joint I think was used in 3/4 ton truck. Which has a partial enclosed torque tube and a open drive shaft.
Also, the 3/4 ton truck used a different (shorter) rear yoke.

1950 Shop manual (1/2 ton U-Joint) [chevy.oldcarmanualproject.com]

Re: 1950 Chevy PU Torque Tube Disconnect
MikeA777 #1382102 Sat Oct 24 2020 10:53 PM
Joined: Jan 2001
Posts: 5,028
P
Master Gabster
The transmissions that used that type of joint had special indents in the case to clear the trunnions during disassemble and assembly. See pic.

Attached Files

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Re: 1950 Chevy PU Torque Tube Disconnect
MikeA777 #1382115 Sun Oct 25 2020 02:11 AM
Joined: Mar 2011
Posts: 1,509
J
Shop Shark
Pre '68 Dave what type of tranny & year/s was that housing used on ?
I never seen a rear housing that looks like that.

MikeA777 are you sure your truck is a 1/2 ton ?
Post a picture of the entire drive line.

Picture of 4 speed tranny with u-joint attached. [pbase.com]
The 4 speed tranny was used in a 1950 3/4 ton truck.
The only way to separate the u-joint is to remove, the whole u-joint assembly from the tranny by
running a socket through the center of the yokes and unbolting the front yoke from the tranny's main output shaft.

Re: 1950 Chevy PU Torque Tube Disconnect
MikeA777 #1382129 Sun Oct 25 2020 12:19 PM
Joined: Mar 2020
Posts: 68
M
Wrench Fetcher
I am not certain the truck is a 1/2 ton. That's what the title says but the plate on the door jamb is not original. Here are some pics.

Re: 1950 Chevy PU Torque Tube Disconnect
MikeA777 #1382130 Sun Oct 25 2020 12:25 PM
Joined: Mar 2020
Posts: 68
M
Wrench Fetcher
Here are the pics

Attached Files
Driveline front.jpg (501.17 KB, 153 downloads)
Driveline rear.jpg (384.48 KB, 158 downloads)
U joint 2.jpg (204.4 KB, 160 downloads)
Tranny front.jpg (161.87 KB, 155 downloads)
Tranny back.jpg (141.27 KB, 147 downloads)
Re: 1950 Chevy PU Torque Tube Disconnect
jorb #1382147 Sun Oct 25 2020 04:18 PM
Joined: Jan 2001
Posts: 5,028
P
Master Gabster
Jorb,
I believe that joint style was used on 1940-47 3/4 ton trucks.


See the USA in your vintage Chevrolet!
My Blog
Re: 1950 Chevy PU Torque Tube Disconnect
MikeA777 #1382149 Sun Oct 25 2020 04:23 PM
Joined: Jan 2001
Posts: 5,028
P
Master Gabster
Mike, is your truck a 1947?


See the USA in your vintage Chevrolet!
My Blog
Re: 1950 Chevy PU Torque Tube Disconnect
MikeA777 #1382153 Sun Oct 25 2020 04:27 PM
Joined: Mar 2020
Posts: 68
M
Wrench Fetcher
Pre '68 Dave. Truck is titled as a 1950 but i'm not confident that is accurate. Maybe someone grabbed an old transmission and put it in the truck.

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