Front Differential Symptom Diagnosis

Condition	Possible Cause	Action
Gear noise	Deteriorated or water mixed lubricant	Repair and replenish referring to FRONT DIFFERENTIAL OIL CHANGE .
	Inadequate or insufficient lubricant	Repair and replenish referring to FRONT DIFFERENTIAL OIL CHANGE .
	Maladjusted backlash between drive bevel pinion and gear	Adjust as prescribed referring to FRONT DIFFERENTIAL ASSEMBLY DISASSEMBLY AND REASSEMBLY .
	Improper tooth contact in the mesh between drive bevel pinion and gear	Adjust or replace referring to FRONT DIFFERENTIAL ASSEMBLY DISASSEMBLY AND REASSEMBLY .
	Loose drive bevel gear securing bolts	Replace or retighten referring to FRONT DIFFERENTIAL ASSEMBLY DISASSEMBLY AND REASSEMBLY .
	Damaged differential gear(s) or differential pinion(s)	Replace referring to FRONT DIFFERENTIAL INSPECTION .
Bearing noise	(Constant noise) Deteriorated or water mixed lubricant	Repair and replenish referring to FRONT DIFFERENTIAL OIL CHANGE .
	(Constant noise) Inadequate or insufficient lubricant	Repair and replenish referring to FRONT DIFFERENTIAL OIL CHANGE .
	(Noise while coasting) Damaged bearing(s) of drive bevel pinion	Replace referring to FRONT DIFFERENTIAL INSPECTION .
	(Noise while turning) Damaged differential side bearing(s) or axle bearing(s)	Replace referring to FRONT DIFFERENTIAL INSPECTION .
Oil leakage	Clogged breather plug	Clean .
	Worn or damaged oil seal	Replace .
	Excessive oil	Adjust oil level referring to FRONT DIFFERENTIAL OIL CHANGE .
	Loose differential carrier bolts	Replace or retighten .