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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: Jul 2005 Posts: 66 Shop Shark | | Shop Shark Joined: Jul 2005 Posts: 66 | Is an overdrive from a '57 Chevy car the same as an overdrive from a '55 Chevy Pickup? What is this transmission worth? | | | | | Joined: Mar 2002 Posts: 990 Member | | Member Joined: Mar 2002 Posts: 990 | They can be, but I have heard that the truck ones have more splines on the shafts. They go from 100-150 depending on how well they work and if all the bits are there. | | | | | Joined: Jan 2001 Posts: 1,422 ODSS President | | ODSS President Joined: Jan 2001 Posts: 1,422 | Double that ($) for a rebuild and then there's the "ebay factor". Same amount of splines. These Borg-Warner transmissions have a .70 overdrive gear resulting in this formulation for my final drive .70 X 3.90 ('57 open rear differential) = 2.73.
Perfect gearing for highway speed and fuel economy. I have had this transmission installed in this configuration on my '49 1/2 ton now for 6 years+.
~ Cosmo
1949 Chevy Half Ton
Rocinante, like Don Quixote, he is awkward, past his prime, and engaged in a task beyond his capacities.
"...my good horse Rocinante, mine eternal and inseparable companion in all my journeys and courses." ...Don Quixote, Cervantes
"If you come to a fork in the road, take it."...Yogi Berra
"Rudeness is the weak man's imitation of strength." ...Eric Hoffer
| | | | | Joined: Apr 2005 Posts: 2,097 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,097 | There is no difference internally. The only difference is in the mounting to the bellhousing. The car trans has 4 open holes in which the bolts are threaded into the bellhousing. The truck has the lower holes on the trans threaded and the bolts are installed from inside the bellhousing into the trans. It is easy to work around these differences. The transmission case and gears are essentially the same as a standard muncie car or truck 3 speed.
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
| | | | | Joined: Jul 2000 Posts: 580 'Bolter | | 'Bolter Joined: Jul 2000 Posts: 580 | The side cover and levers that operate the shifting forks may be different but I believe that can be overcome by using the side cover from your old tranny. | | |
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