fnny6770
Full Access Member
- Joined
- May 11, 2024
- Posts
- 55
- Reaction score
- 29
- Location
- Pocatello
- First Name
- Paul
- Truck Year
- 1980
- Truck Model
- 3500 camper special
- Engine Size
- 454
My 1980 GMC 1 ton truck came from the factory with four 10 gears 400 engine and a th400 tranny, my brother put a 454 in it with a three speed manual transmission and it seems like the differential gears are too high, my question is what size differential gears would have came with a manual transmission?