| Inspect for the proper transaxle and gear oil levels prior to performing system diagnosis. |
| Low gear oil level |
Inspect the transfer case for leaks, repair as required.
Refer to Transfer Case Leak Diagnosis , and Adhesives, Fluids, Lubricants, and Sealers . |
| Incorrect gear oil in the transfer case |
Replace the gear oil.
Refer to Adhesives, Fluids, Lubricants, and Sealers . |
| Worn propeller shaft constant velocity joints |
Replace propeller shaft assembly.
Refer to Symptoms - Propeller Shaft
. |
Bearing noise within the transfer case
- A grinding noise that occurs at a specific engine speed, regardless of transmission gear, is not within the transfer case.
- A grinding noise that changes as a transmission shift occurs is not within the transfer case.
- A grinding noise that changes as vehicle speed changes may be also caused by worn wheel bearings.
- A grinding noise that changes as the vehicle turns may also be caused by worn wheel bearings and/or tires.
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- Inspect for the proper transfer case fluid level. Fill, as required.
- Identify the location of the noise using the J 39570
Chassis Ears.
- If the noise continues, inspect the internal components. If damage is present, replace the assembly as required.
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Gear set whine noise within the transfer case
- A whine noise that occurs at a specific engine speed, regardless of transmission gear, is not within the transfer case.
- A whine noise that changes as a transmission shift occurs is not within the transfer case.
- A whine noise that changes as vehicle speed changes may be also caused by worn wheel bearings.
- A whine noise that changes as the vehicle turns may also be caused by worn wheel bearings and/or tires.
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- Inspect for the proper transfer case fluid level. Fill, as required.
- Identify the location of the noise using the J 39570
Chassis Ears.
- If the noise continues, inspect the internal components. If damage is present, replace the assembly as required.
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