Rear Differential Symptom Diagnosis

Condition	Possible Cause	Action
Gear noise	Deteriorated or water mixed lubricant	Repair and replenish referring to Rear Differential Oil Change.
	Inadequate or insufficient lubricant	Repair and replenish referring to Rear Differential Oil Change.
	Maladjusted backlash between bevel pinion and gear	Adjust as prescribed referring to Rear Differential Disassembly and Reassembly.
	Improper tooth contact in the mesh between bevel pinion and gear	Adjust or replace referring to Rear Differential Disassembly and Reassembly.
	Loose bevel gear securing bolts	Replace or retighten referring to Rear Differential Disassembly and Reassembly.
	Damaged differential gear(s) or pinion(s)	Replace referring to Rear Differential Disassembly and Reassembly.
Bearing noise	Constant noise: Deteriorated or water mixed lubricant	Repair and replenish referring to Rear Differential Oil Change.
	Constant noise: Inadequate or insufficient lubricant	Repair and replenish referring to Rear Differential Oil Change.
	Noise while coasting: Damaged bearing(s) of bevel pinion	Replace referring to Rear Differential Disassembly and Reassembly.
	Noise while turning: Damaged differential side bearing(s)	Replace referring to Rear Differential Disassembly and Reassembly.
Oil leakage	Clogged breather hose	Clean.
	Worn or damaged oil seal	Replace.
	Excessive oil	Adjust oil level referring to Rear Differential Oil Change.
	Loose differential carrier bolts	Replace or retighten.