contact pattern

The first time I tightned the yoke my wrench was set on 80 ft.lb.s
It did`nt even click yet and that jambed the pinion so tight I could`nt budge it by hand, so that`s when I backed it off to determine what nut torque was required to give me the 20 in.lb of drag for future refference/assembly.
If I was to go to 175- I`m thinking it`d take a 4' pipe wrench to turn that yoke.
Your saying adding shim, where? to do what?