Lube the splines...

[Gerald]

This didn't work because there is not enough threads for the bolt not to strip at the torque you need to seat the stud so next time in going to use these coupling nuts which should work good. I ended up doing as journeyman suggested, using two nuts tightened against eachother to jam it so it wouldnt move.

Take two of the right size nuts and screw on the stud, tighten one against the other, then tighten the top nut screwing the stud into the housing until tight, then with two wrenches loosen top nut and remove both nuts.