Cause | Correction | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Inspect for the proper gear oil levels prior to performing system diagnosis. | |||||||||
Low gear oil levels | Faulty oil seals or other type leaks may contribute to lower than required fluid levels. Fill to proper level with gear oil GM P/N United States 12378514, GM P/N Canada 88901045. | ||||||||
Worn propeller shaft constant velocity joint | Replace the propeller shaft assembly. Refer to Propeller Shaft Replacement in Propeller Shaft. A worn propeller shaft constant velocity joint may create a clicking, grinding or snapping type noise. | ||||||||
Worn or loose center bearing assembly | Replace the center bearing assembly as required. A worn center bearing assembly may cause vehicle vibration or a grinding or squealing type noise. | ||||||||
Worn universal joints | Replace the universal joints as required. A worn universal joint may create a clicking or snapping type noise. | ||||||||
Worn axle shaft constant velocity joints | Replace/repair the constant velocity joints as required. A worn axle shaft constant velocity joint may create a clicking, grinding or snapping type noise. | ||||||||
Bearing noise within the transfer case | A grinding or roar type noise will increase or decrease relative to the vehicle speed.
| ||||||||
Gear set whine noise within the carrier assembly | A whine type noise will increase or decrease relative to the vehicle speed, approximately 80-97 km/h (50-60 mph).
Contributing factors may include:
| ||||||||
