85406, I'm kinda confused here. It is a GM rear end with crush sleeve. It takes very little effort to put the pinion nut on with 25 inch/pounds. (I had a hard time findin a in/lb torque wrench. So after every thing is set up do you tighten the pinion nut up as high as you can? Thanks for the quick response, greatly appreaciated if any one else wants to jump in.