Transfer Case Clunk during Acceleration and Deceleration
WARNING: This page is about a different car, the 2004 Cadillac Escalade EXT, 2004 Cadillac Escalade ESV, and 2004 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
Transfer Case Clunk during Acceleration and Deceleration
| 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 Capacities - Approximate Fluid .
|
| Excessive clearance between the slip yoke and the rear output shaft |
- Inspect for the following conditions:
- Worn slip yoke splines
- Worn rear output shaft splines
- Repair or replace the following components if faulty.
- Replace the slip yoke, if required. Refer to Propeller Shaft Replacement - Rear
in Propeller Shaft.
- Replace the rear output shaft, if required. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - BW 4481-NR3 Unit Repair.
|
| Excessive clearance between the slip yoke and the rear bushing |
- Inspect for the following conditions:
- Worn rear bushing
- Worn slip yoke bushing journal
- Repair or replace the following components if faulty.
- Replace the slip yoke, if required. Refer to Propeller Shaft Replacement - Rear
in Propeller Shaft.
- Replace the rear case half if the rear bushing is worn. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - BW 4481-NR3 Unit Repair.
|
| Worn or faulty planetary differential |
- Inspect the planetary differential for the following conditions:
- Replace the planetary differential assembly if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - BW 4481-NR3 Unit Repair.
|
| Worn or missing sun gear thrust washer |
- Inspect to ensure the thrust washer is installed.
- Inspect the thrust washer and mating surface for excessive wear.
- Replace the worn or missing thrust washer. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - BW 4481-NR3 Unit Repair.
|
| Worn or damaged rear sun gear |
- Inspect the sun gear external gear teeth for excessive wear.
- Inspect the sun gear to rear output shaft for excessive looseness.
- Replace the sun gear or rear output shaft if worn. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - BW 4481-NR3 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 damaged retaining ring groove in the rear case half
- Repair or replace the following components if found faulty:
|