I have a 75 f100 4x4 on 35s 360 great power but I keep breaking rear axle pinion's and yoke's does any one no how to fix this I have spent 1000 in rear end parts so far

 

Upgrade to 1350 chrome moly yokes, welded ends, and U-joints.

Quality counts:

Pinion Yokes / U-Bolts - 9" Center Sections / Components - Street / Track

U-Joints / Weld Ends / Tubing - Driveshafts / Components - Street / Track

 

Heavy foot on throttle ? No it sounds like you need to upgrade. I'v never broken the yoke on one but i have took out u-joints and strip the splines of of an axle. Any how , welcome to F T E , the only ford truck forum that the members go out of their way to help you.____ JIM