Cause
| Correction
|
DEFINITION: A faulty internal transfer case component that causes a growl or grinding noise in the transfer case, usually while the vehicle is turning.
Review the
Symptoms - Transfer Case
and perform the necessary inspections.
|
Planetary carrier
|
- Inspect the planetary carrier pinion gears for the following
conditions:
• | Chipped, bent or deformed teeth |
• | Pinion gear bushings worn |
• | Pinion gear thrust washers missing |
• | Seized or binding pinion gears |
- Inspect the planetary carrier for deformation. Refer to
Transfer Case Cleaning and Inspection
in Transfer Case -
NVG 149-NP3 Unit Repair.
- Replace the planetary carrier assembly if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case -
NVG 149-NP3 Unit Repair.
|
Annulus gear
|
- Inspect the annulus gear for teeth damage or wear. Refer to
Transfer Case Cleaning and Inspection
in Transfer Case -
NVG 149-NP3 Unit Repair.
- Replace the annulus gear if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - NVG 149-NP3
Unit Repair.
|
Sun gear
|
- Inspect the sun gear for the following conditions:
• | Worn or galled thrust surfaces |
- Replace the sun gear if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - NVG 149-NP3
Unit Repair.
|
Thrust washer
|
- Inspect the thrust washer for seizure to the planetary carrier.
- Inspect the thrust washer for galling.
- Replace the thrust washer if faulty, and the mating component
if damaged. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - NVG 149-NP3 Unit Repair.
|