GM 19132922
Differential

Clean the differential case components in solvent and examine them for cracks, improper shape of threaded bolt holes, severe wear, scoring, or grooving in the clutch pack area, and scored or damaged case side bearing flange. When cleaning the gears and shafts, use a solvent and check the gears for chips, cracks, pitting, heat discoloration, abnormal wear, high wear or scoring in side gear pin bores, excessive wear or scoring on side gear washing, abnormal wear or grooves on output gears splines, damage to side gear threaded bolt holes, unusual wear or grooves on ring gear; damage to ring gear vehicle speed interval relucor ring lobes. Check the shafts for abnormal wear, grooved, worn or damaged splines, and an impaired C-clip groove. Wipe the discs and plates down with solvent and check them for abnormal wear, scoring or grooving on the separator plate friction surfaces friction plates with uneven wear or worn friction material, bent or warped plates or discs, and worn, scored, or collapsed Belleville washer. Lay the plates and discs on a flat surface to check for warpage. Examine the bearing rollers and cups for pitting, scoring, grooves, excessive wear, or some other defect, and observe heat discoloration of yellow to dark blue tones, indicating excessive loading or improper lubrication; bearings or cups depicting heat decolorization should be replaced. In addition, look for deformed or damaged bearing cages.

Clean them with solvent and inspect for unusual wear, scoring, or grooves on the separator plate friction surfaces, uneven wear or worn friction material on friction plates, bent or warped plates or discs, and a worn, scored, or collapsed bellville washer.

Check for pitting, scoring, grooves, excessive wear, or other damage, and look for heat discoloration, which indicates potential overload or improper lubrication; any bearings or cups showing heat discoloration must be replaced.