Cause
| Correction
|
DEFINITION: A faulty internal transfer case component that causes a growl or grinding noise in the transfer case.
Review the
Symptoms - Transfer Case
and perform the necessary inspections.
|
High/low planetary carrier assembly
|
- Inspect the high/low planetary carrier pinion gears for the following
conditions:
• | Chipped, bent or deformed teeth |
• | Pinion gear needle bearing worn |
• | Pinion gear thrust washers missing |
• | Seized or binding pinion gears |
- Inspect the high/low planetary carrier input gear for excessive
thrust end play.
- Inspect the input gear teeth for excessive wear or damage.
- 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 - BW 4482-NR4 Unit
Repair.
|
Annulus gear
|
- Inspect the annulus gear for teeth damage or wear. Refer to
Transfer Case Cleaning and Inspection
in Transfer Case -
BW 4482-NR4 Unit Repair.
- Replace the annulus gear if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - BW 4482-NR4
Unit Repair.
|
Planetary differential
|
- Inspect the planetary differential 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 differential for deformation. Refer to
Transfer Case Cleaning and Inspection
in Transfer Case -
BW 4482-NR4 Unit Repair.
- Replace the planetary differential assembly if faulty. Refer
to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case -
BW 4482-NR4 Unit Repair.
|
Sun gears
|
- Inspect the sun gears for the following conditions:
• | Worn or galled thrust surfaces |
- Replace the sun gears if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - BW 4482-NR4
Unit Repair.
|
Thrust washers
|
- Inspect the thrust washers for seizure to the planetary differential.
- 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 - BW 4482-NR4 Unit Repair.
|
Planetary differential not timed properly
|
- Inspect the planetary differential for being timed properly.
Refer to
Transfer Case Assemble
in Transfer Case - BW 4482-NR4 Unit Repair.
- Properly time the planetary differential gears. Refer to
Transfer Case Assemble
in Transfer Case -
BW 4482-NR4 Unit Repair.
|