Differential Inspection

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Check the pinion gear shaft for unusual wear.
Check the pinion and the side gear teeth for wear, cracks, scoring and spalling.
Check the thrust washers for wear.
Check the fit of the side gears in the differential case and on the axle shafts.
Check the differential case for cracks and scoring and replace all of the worn parts as necessary.