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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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | Think of it this way. An overdrive trans does not change the speed the drive shaft at any given speed. But an axle gearing change does.
Most of the changes to rear gears lower the drive shaft speed if they change it at all and that is what I was saying.
I once bought a '50 Chevy 1-ton that had a 3.42 rear under it. The guy I bought it from said the old 216 would not provide enough torque to move the truck with any load at all. I never tested what he said but I believe it.
There is a reason for those original deep gears and I think some times people have unrealistic expectations about what they can accomplish with an overdrive or gear change.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | |
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