Cause
| Correction
|
DEFINITION:
During acceleration or deceleration, a clunk is heard or felt in the transfer
case.
Review the
Symptoms - Transfer Case
and perform the necessary inspections.
|
Incorrect fluid level or incorrect fluid
|
- Inspect the transfer case for the correct fluid level. Refer to
Transfer Case Fluid Replacement
.
- Inspect the transfer case for the correct type of fluid.
- Flush the transfer case and fill with the correct fluid, if required.
Refer to
Transfer Case Fluid Replacement
.
|
Excessive clearance
between the slip yoke and the rear output shaft
|
- Inspect for the following conditions:
• | Worn rear output shaft splines |
- Repair or replace the following components if faulty.
|
Excessive clearance between the slip yoke and the rear bushing
|
- Inspect for the following conditions:
• | Worn slip yoke bushing journal |
- Repair or replace the following components if faulty.
• | Replace the rear case half if the rear bushing is worn. Refer
to
Transfer Case Assemble
in Transfer
Case - BW 4473-NP3 Unit Repair. |
|
Worn or faulty planetary carrier
|
- Inspect the planetary carrier for the following conditions:
• | Worn or faulty pinion gears |
• | Planetary carrier to mainshaft splines for wear |
- Replace the planetary carrier assembly and annulus gear if
faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer
Case - BW 4473-NP3 Unit Repair.
|
Worn or missing sun gear
thrust washers
|
- Inspect to ensure the thrust washers are installed.
- Inspect the thrust washers and mating surface for excessive wear.
- Replace the worn or missing thrust washers. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - BW 4473-NP3
Unit Repair.
|
Worn or damaged sun gear
|
- Inspect the sun gear external gear teeth for excessive wear.
- Replace the sun gear or rear output shaft if worn. Refer
to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case -
BW 4473-NP3 Unit Repair.
|
Rear output shaft bearing outer retaining
ring
|
- Inspect for the following conditions:
• | Proper installation of the rear output shaft bearing retaining
ring |
• | Excessive wear or damage to the retaining ring groove in the rear
case half |
- Repair or replace the following components if found faulty. Refer
to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case -
BW 4473-NP3 Unit Repair.
• | Properly install a new rear output shaft bearing outer retaining
ring. |
• | Replace the rear case half if the retaining ring groove is excessively
worn. |
|