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:
• | Chipped, bent or deformed teeth |
• | Planetary gear bushings worn |
• | Planetary gear thrust washers missing |
• | Seized or binding planetary gears |
- 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
Transfer Case 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:
• | Metal embedded in the root of the teeth |
- 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.
|