Install the pinion gear, spacer, preload shim pack, front bearing, and yoke with washer and nut into the case. DO NOT install the pinion seal at this time. Torque the nut to the proper specs and check turning torque of the pinion with the inch pound torque wrench. This sets the bearing preload. To much turning torque - increase the shim pack thickness. Not enough turning torque - decrease the shim pack thickness.
This is the shim pack behind the front bearing, NOT the shim pack in the case behind the rear bearing cup.
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