I am looking to identify what i have in my 1956 Chevy 3100. The numbers i was able to get off the rear-end look to be the following. Driverside number shows 339 (2 screw heads on each side, to right of that is a symbol, 12 raised dots in circle, with a screw head in middle, raised) Passengerside shows 3707340, and below that it has a symbol that looks like a sliced pie looking down on it, and next to the symbol is D2 The pie symbol as i call it, is the same size basically as the numbers. Any help appreciated. I am pretty sure this is the original rear-end to the truck. I am looking to switch the gear ratio to something like a 3.38 so i can go over 50mph.
A rear-axle id chart i have shows that i should find the letters AF for 3.90 gear ration or AG for the 4.11 ratio. But i don't see those letters anywhere? I just want to make sure i know what i have, and am ordering the right gears and components to switch it out. Thanks for any help.
Gene
