The standard gear ratio for a 1/2 ton in 56 was 3:90 to one. That ratio was fairly standard from 55 through 59. If it came with an overdrive it probably had a 4:10.


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