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Re: Open Vs Closed Driveline
#231851 Tue Apr 17 2007 03:36 AM
Joined: Oct 2003
Posts: 5,161
O
Cruising in the Passing Lane
Quote
Originally posted by meansam:
ration of sprung weight to unsprung weight
I hadn't thought of that aspect, but I think you'd need an engineer with a slide rule (showing my age!) to determine just how much of the torque tube was sprung versus not and how much of the driveshaft ends up as unsprung weight.

Unsprung weight also has a significant impact on handling and that would be another consideration.

And of course in the case of a IRS with a torque tube (C5 or C6 vette) you aren't going to have any unsprung weight from the driveshaft. There is one guy I know of who was talking about building a hot rod Task Force pickup on C5 stuff, so it does have some connection to old trucks. I don't know if he did it or not and I've not seen any pictures.


Its true, I really don't do anything but browse the Internet looking for trouble...
Steve@OldSub.com . www.OldSub.com . www.MaxwellGarage.com . www.OldGasTowRigs.com
'55 1st GMC Suburban . '54 GMC 250 trailer puller project. '54 GMC 250 Hydra-Matic . '54 Chevy 3100 . '47 Chevy COE . and more...
Re: Open Vs Closed Driveline
Grigg #1336578 Thu Dec 05 2019 09:45 PM
Joined: Oct 2019
Posts: 227
T
Shop Shark
Grigg,

I have a 1940 1.5 ton with torque tube, so they were definitely not all
Open.

Re: Open Vs Closed Driveline
FPMnky #1336586 Thu Dec 05 2019 10:48 PM
Joined: Sep 2001
Posts: 30,153
ace skiver
The 1940 Specifications Manual shows all sizes had a torqe-tube.

If I am reading that incorrectly, please let me know.


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: Open Vs Closed Driveline
FPMnky #1336589 Thu Dec 05 2019 11:01 PM
Joined: Jul 2000
Posts: 990
G
Shop Clutterist
12 years later you point out a guy's error? No statute of limitations on the Stovebolt page!


Gord
----
1954 1/2 ton 235 4 speed
Re: Open Vs Closed Driveline
tclederman #1336590 Thu Dec 05 2019 11:02 PM
Joined: Oct 2019
Posts: 227
T
Shop Shark
Here is a pic of my torque tub axle currently under my 1940 1.5 ton. [img]https://www.stovebolt.com/ubbthread...B489F25-9B9B-40EE-9CFF-72FB29DE2A76.jpeg[/img]


For some reason I could only link to the pic I uploaded and not able to insert it.

Last edited by Tony292; Thu Dec 05 2019 11:03 PM.
Re: Open Vs Closed Driveline
Gord&Fran #1336592 Thu Dec 05 2019 11:05 PM
Joined: Oct 2019
Posts: 227
T
Shop Shark
Originally Posted by Gord&Fran
12 years later you point out a guy's error? No statute of limitations on the Stovebolt page!


I used the search function as is always recommends here. I don’t get a lot of results for converting a big bolt torque tube over to open driveshaft.

Re: Open Vs Closed Driveline
FPMnky #1336599 Fri Dec 06 2019 12:03 AM
Joined: Feb 2001
Posts: 6,799
W
Master Gabster
I have a 1979 nova rear end on my 1954 3100 but you will have to have a custom driveshaft made or get lucky like did. There are some other issues like the width of the springs, wider on newer cars and trucks. All are feasible with time and money. I believe it is worth it. I have 33,000 miles on the truck since being modified.

Last edited by WE b OLD; Fri Dec 06 2019 12:06 AM.

Ron, The Computer Greek
I love therefore I am.

1960 MGA Roadster Sold 7/18/2017
1954 3100 Chevy truck in the Gallery
2017 Buick Encore
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Re: Open Vs Closed Driveline
FPMnky #1336675 Fri Dec 06 2019 04:46 PM
Joined: Nov 2000
Posts: 1,915
F
Shop Shark
Hot Rod Lincoln explained it the best. The torque-tube is a different method of "driving" or propelling the vehicle. The enclosed drive shaft tube pushes against a bracket that's mounted to a crossmember in the truck frame at the rear of the transmission. The driving forces push against the vehicle near it's center, as Jerry wrote, rather than thru the springs. That's why the spring brackets have swivels on 3100s and Chevy cars. The enclosed front section of the drive shaft on 3/4-tons is a mystery. I think it was made this way so Chevy could use the same transmissions in 1/2-tons and 3/4-tons. Maybe not. smile


Professional Novice
Re: Open Vs Closed Driveline
FPMnky #1336676 Fri Dec 06 2019 04:52 PM
Joined: Sep 2001
Posts: 30,153
ace skiver


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
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