[PGSigns]

The crush sleeve is used to set the bearing preload. As you tighten the nut the crush sleeve will shorten up and keep the space between the bearings set. The process for putting one together with a crush sleeve is to pull the nut down (this where the vice comes in handy) till you feel a bit of resistance on the bearings. Then take an inch pound dial torque wrench and test the rolling resistance of the pinion. Then back in the vice and ad a little more torque to the nut and test again till you get it where it needs to be. I do not use an impact to tighten the nut. It is very easy to to go to far and have way more preload than you need leading to early bearing departure from this world. Here is a quick video on setting the preload.
https://www.youtube.com/watch?v=lD8QNQATrNs
Jimmy