Our Dana 44 has no depth shims on the pinion itself, so we installed the rear pinion bearing. This is usually done with a press but can be done with a hammer by a home mechanic. You’ll need a piece of tube and/or a spacer to press down on the bearing inner race and not the cage. Protect the pinion gear teeth by using a piece of aluminum as the anvil surface. All bearings are installed with a light coating of oil.