If you want to do it right, get a new crush sleeve that goes between the bearings and set the pinion bearing preload torque to the right specification by tightening the pinion nut a little at a time and checking the rotation torque with an inch-pound wrench. I believe the specification for used bearings is around 20 inch pounds. Remove the drive axles for the best torque check.
Jerry
The Dana 44 and 60 use shims.
Spec
