Originally Posted by 4oldtrucks
A motor, tranny (overdrive) and rear end was always in the plans. I read an excellent Tech Tips that describes an easy swap to a 4:10 ratio. I've been looking for a donor rearend and learning they are few and far between.
I spent some time in a salvage yard yesterday and found 3 trucks with what appear to be Eaton rear axles. They were all 1960-65 trucks with 4 speed transmissions. How can I determine what the rear axle ratio is by looking at a rear end, especially if there is no ID tag on it? These were all in trucks sitting on the ground maybe with a wheel or two on them, access is very difficult. They want $350 for the 3rd member and no guarantees on the axle ratio, you get what you tell them to pull. Recommendations?

The 4:10 were only in the automatic trans trucks.

Last edited by 68ironhead; 12/21/2022 5:36 PM. Reason: reply