Transfer Case Growl or Grinding Noise
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Transfer Case Growl or Grinding Noise
| Cause |
Correction |
DEFINITION: A faulty internal transfer case component that causes a growl or grinding noise in the transfer case while the vehicle is turning or in a four wheel drive mode.
Review the Symptoms - Transfer Case and perform the necessary inspections. |
| High/low planetary carrier assembly |
- Inspect the high/low planetary carrier planetary gears for the following conditions:
- Replace the high/low planetary carrier assembly if any of the above conditions exist. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - NVG 261-NP2 Unit Repair.
|
| Input gear |
- Inspect the input gear teeth for excessive wear or damage. Refer to
Cleaning and Inspection
in Transfer Case - NVG 261-NP2 Unit Repair.
- Replace the input gear if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - NVG 261-NP2 Unit Repair.
|
| Thrust washers |
- Inspect for missing or damaged thrust washers for the input gear.
- Inspect the thrust washers for galling.
- Replace the thrust washers if faulty and the mating component if damaged. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - NVG 261-NP2 Unit Repair.
|
| Annulus gear |
- Inspect the annulus gear teeth for the following conditions:
- Replace the front case half if the annulus gear is faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - NVG 261-NP2 Unit Repair.
|