Are all 9" rears virtually the same?

northbayclay · Post by **northbayclay** » January 18, 2007, 6:49 pm

Can I feel fairly confident swapping the pumpkins in my trucks? They are a '64 F100 and a '65 F100...both stock Ford 9".

I've heard talk of rear axles with different numbers of splines, but I imagine that has to do with 4X4's or heavier trucks.

Thanks for any help

Clay

Johnny Canuck · Post by **Johnny Canuck** » January 18, 2007, 6:54 pm

All you ever wanted to know about 9" rear ends
http://www.kevinstang.com/Ninecase.htm

northbayclay · Post by **northbayclay** » January 18, 2007, 7:05 pm

Thanks JC- I'll check it out.

Clay

Truckfarmer · Post by **Truckfarmer** » January 19, 2007, 7:50 am

The rears should be the same. Both should have 28 spline carriers. Ford went to 31 splines in trucks about 1973. Should be a simple swap.
Be sure the input yoke is the same. They are interchangable if you have to swap them. Becomes a pain to do as the yoke nut is torqued to 170 ft/lbs. If you remove the yoke, you should install a new "crush sleeve".

6166 Junkyard Dog · Post by **6166 Junkyard Dog** » January 19, 2007, 8:02 pm

Just a short note that on 70-72 F-100 Ford Trucks did carry a 31 spline axle also so be on a watch on that too so 73 was not the first years of the 31 spline axles

banjopicker66 · Post by **banjopicker66** » January 19, 2007, 8:39 pm

Check the spline count for sure. I had a '70 F-100 with 31 spines.