Its been a while since I last done a rear end (no pun intended)... I remember when I installed the yoke back on the pinion I always rattle jacked it real quick. Then you use a torque wrench to find the "running torque" or the lightest amount of torque it takes to make the pinion spin continously. There should be torque specs around the internet for that. As for the crush sleeve I can not recall its installation location at this time.