Its in an early bronco, he is running 39.5 boggers and still has a 9" and a 44 although the 9" is a big bearing 31 spline deal. He broke everything when he broke, left axle, ring and pinion, third member housing, and possibly a detroit doing a little research it sounds like 4 out of 5 times when the axle breaks at the splines you take out the detroit too. Man I am glad I have a 14b