Intermittent Noise
| Cause | Correction |
|---|---|
| Inspect for the proper transaxle and gear oil levels prior to performing system diagnosis. Refer to Transfer Case Fluid Replacement . | |
| Loose propeller shaft mounting bolts | Tighten the bolts, as required. Refer to Propeller Shaft Replacement . |
| Loose torque tube bracket or a damaged bracket bushing | Tighten the bracket bolts or replace the bracket, as required. |
| Incorrect gear oil | Replace the gear oil. Refer to Adhesives, Fluids, Lubricants, and Sealers . |
Constant Noise
| Cause | Correction |
|---|---|
| Inspect for the proper transaxle and gear oil levels prior to performing system diagnosis. Refer to Transfer Case Fluid Replacement . | |
| Low gear oil levels | Faulty oil seals or other type of external leaks may contribute to lower than required fluid levels. Refer to Transfer Case Leak Diagnosis . Fill to proper level with gear oil. Refer to Adhesives, Fluids, Lubricants, and Sealers . |
| Worn propeller shaft constant velocity joints | Replace the propeller shaft assembly. Refer to Propeller Shaft Replacement . |
| Worn bearing in the rear differential torque tube assembly | Replace the torque tube assembly. |
| Bearing noise within the transfer case A grinding or roar type noise will increase or decrease relative to the vehicle speed. | Inspect for the proper fluid level. Fill, as required. If the noise continues, repair or replace the internal components, as required. |
| Gear set whine noise within the transfer case A whine type noise will increase or decrease relative to the vehicle speed. | Inspect for the proper fluid level. Fill, as required. If the noise continues, repair or replace the internal components, as required. Contributing factors may include: Incorrect backlash between the gear sets Worn or damaged gear teeth Transaxle assembly noise Rear differential noise |