Trac-Lok - Locking Differential: NVH Dodge Durango I

DIFFERENTIAL NOISE

1. Ensure differential lubricant is at normal operating temperature. Road test vehicle. Note if differential noise exists in turns, but not during straight-ahead driving. Probable cause is incorrect or insufficient rear axle lubricant or additive.
2. Drain and refill rear axle. See «FLUID DRAIN & REFILL»(ref-97859-S33961192492001051100000) under LUBRICATION. Road test vehicle making 10-12 slow figure-8 turns, and note if noise still exists. It may be necessary to disassemble rear axle so differential can be repaired. See RBI FULL FLOATING AXLES article for removal of differential case.