DEFINITION: During acceleration or deceleration, a clunk is heard or felt in the transfer case when it is in AWD mode.

Review the Symptoms - Transfer Case and perform the necessary inspections.

Incorrect fluid level or incorrect fluid

1. Inspect the transfer case for the correct fluid level.
2. Inspect the transfer case for the correct type of fluid. Refer to Approximate Fluid Capacities .
3. 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

1. Inspect for the following conditions:

•	Worn slip yoke splines

•	Worn rear output shaft splines

2. Repair or replace the following components if faulty:

•	Replace the slip yoke, if required. Refer to Rear Propeller Shaft Replacement .

•	Replace the rear output shaft, if required. Refer to Transfer Case Disassemble and Transfer Case Assemble .

Excessive clearance between the slip yoke and the rear bushing

1. Inspect for the following conditions:

•	Worn rear bushing

•	Worn slip yoke bushing journal

2. Repair or replace the following components if faulty:

•	Replace the slip yoke, if required. Refer to Rear Propeller Shaft Replacement.

•	Replace the rear bushing if worn.

-	For light duty vehicles, refer to Rear Output Shaft Seal Replacement .

-	For heavy duty vehicles, refer to Transfer Case Disassemble and Transfer Case Assemble .