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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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| | | | Joined: Apr 2005 Posts: 2,097 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,097 | The standard 3:90 gearset has 39&10, the 4:11 gearset has
37&9. An original OD equipped truck would have had an 4:11 gearset all others would be 3:90. The standard 3sp and 3sp/OD transmission 1'st gear ratio is 2:94 to 1.
I have personal knowledge of a 57 truck using the aftermarket 3:38 gearset and a 56 car using a 3:08 gearset. Both have 235 engines and perform well with the stock 3 speed trans.
I feel the best solution is the 3 sp/OD.
Fred
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
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