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 assembly for the following conditions:
• | Chipped, bent, or deformed teeth |
• | Planetary gear needle bearings worn |
• | Planetary gear thrust washers cracked or 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
.
|
Input shaft
|
- Inspect the input shaft in the planetary carrier assembly for excessive thrust end play.
- Inspect the input shaft teeth for the following conditions:
• | Worn or galled thrust surfaces |
• | Metal embedded in the root of the teeth |
- Replace the input shaft if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
.
|
Thrust washers
|
- Inspect for missing or damaged thrust washers for the input shaft.
- 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
.
|
High/low internal gear
|
- Inspect the high/low internal gear teeth for the following conditions:
• | Metal embedded in the root of the teeth |
- Replace the front case half if the high/low internal gear is faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
.
|