GM 89060165
Housing

Thoroughly clean the differential case parts in the solvent and inspect for cracks, threaded bolt holes damage, unusual arduous, scoring, or grooves in the clutch pack area, and scored or abused case side bearing mount flanges. Clean the gears and shafts with solvent then check inspect the gears for chips, cracks, pittings and heat discoloration,wear wear or scoring of the side gear pin bores, wear grooving or scoring of side gear pin and side gear washer, unusual wear or grooving on output gear splines, damage to ring gear threaded bolt holes, and damage of ring gear vehicle speed sensor reluctor ring lobes. Examine the shafts for abnormally wearing spline, grooved, worn and damaged splines as well as damaged C-clip grooves. Check the cleaning of the discs and plates and their inspection for non-standard wear, scoring, grooves in the separator plate friction surfaces, non-standard wear or worn of friction material and of friction plates, bent and warped plates or discs while putting them on a flat surface for the latter. Inspect for a worn, scored or collapsed bellville washer. Check the bearing rollers and cups for pitting, scoring, grooves, extreme wear and other damage, and inspect them for heat discoloration, which varies from a very light yellow to the extreme dark blue indicating overload or improper lube; any of the bearings or cups exhibiting heat discoloration should be replaced. Last but not the least; inspect bent or damaged bearing cages.