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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Nov 2006 Posts: 27 New Guy | | New Guy Joined: Nov 2006 Posts: 27 | On the 1/2 ton (fully enclosed) and 3/4 ton trucks (part that connects to the transmission only), why did they use the torque tube or closed drive shaft? They were obviously aware of the open drive shafts. The closed seems more costly and harder to work on. I once thought it had something to do with rear wheel traction but the 3/4 ton was closed at the transmission. | | | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | the reason the 3/4 had the closed trans setup with the open rear is so they didn't have to have a different trans for it .... no telling why any older technology is kept or dropped, but the torque tube arrangement is still used in some applications  Bill | | | | | Joined: Oct 2006 Posts: 1,847 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 1,847 | well for one thing it works, and you rarely have to work on them. I bought my truck in 1984, aside from changing oil a couple of times. I have never touched it. As a matter of fact it wasn't until about a year ago that I looked to see what was actually involved back there. It is actually a pretty good set up, since everything is sealed up, unlike the open drive line where the universal joints are exposed to any and everything you happen to drive through. Actually I haven't touched much on the whole truck........
Last edited by brokenhead; 04/19/2011 12:15 PM.
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