Differential Case: Testing and Inspection

EXC. TRACTION-LOK LIMITED SLIP DIFFERENTIAL

Clean all parts in suitable solvent. Dry all parts except bearings with compressed air or shop towels. Allow bearings to air dry or dry with shop towels. Do not use compressed air to dry bearings as damage may result.

Inspect differential bearings and cups for wear, pitting, galling, flat spots or cracks. Any bearing or cup showing any signs of wear or damage must be replaced. Bearings and respective cups must be replaced as an assembly only. Do not attempt to interchange bearings and cups as bearing life will be affected.

Inspect non-machined differential case surfaces for nicks and burrs which can be removed with an oil stone or fine tooth file. Inspect pinion shaft bore to ensure it is not elongated or worn. If damage is evident, differential case must be replaced. Inspect machined differential surfaces and counterbores. They must be smooth and free of nicks, gouges, cracks and other visible damage. If damage is evident, differential case must be replaced.

Inspect pinion shaft for excessive wear, scoring or galling. Ensure shaft is smooth and concentric. If any wear or damage is evident, replace shaft. Inspect pinion shaft lock pin for damage and to ensure it has a snug fit in differential case. Replace lock pin or case as necessary.

Inspect pinion and ring gears for worn or chipped teeth, cracks, damaged bearing journals or attaching bolt threads. If any of the above are evident, replace ring gear and pinion as a matched set.

Inspect pinion and side gears. Gears must exhibit a uniform contact pattern without any signs of cracks, wear, scoring or galling. If any of the above are evident, replace all the gears. Inspect thrust washers for wear and replace as necessary.

Inspect pinion and ring gears for worn or chipped teeth, cracks, damaged bearing journals or attaching bolt threads. If any of the above are evident, replace ring gear and pinion as a matched set.

Inspect axle shaft ``C'' locks (if equipped) for signs of cracks or wear and replace as necessary.

Fig. 8 Installing Tool T80P-4946-A Or Equivalent To Measure Shim Thickness. Ford Traction-Lok:

TRACTION-LOK LIMITED SLIP DIFFERENTIAL
Ford Type

The Cleaning and Inspection of these units is the same as for conventional differentials except that cleaning solvent should not be allowed to contact the clutch plates. The clutch plates should be wiped clean only. In addition, the following steps should be performed which apply to the Traction-Loc differential only.

Visually inspect clutch packs, side gears, pinion gears and pinion shaft for damage or wear and replace as necessary.

Place each clutch pack without shims into tool T80P-4946-A or equivalent, Fig. 6. Torque nut to 40 inch lbs. on 1982---84 models or 60 inch lbs. on 1985---87 models. Using feeler gauge, determine thickness of new shims by inserting thickest blade possible between clutch pack and tool, Fig. 7, and note size for use during reassembly.

Borg-Warner Type
1. Clean and dry parts thoroughly with shop towels. Do not use cleaners or solvents on this unit.
2. Inspect all parts. If any surface shows excessive wear or scoring, replace unit. Slight scoring is acceptable.