DEFINITION: A shudder, binding, or a crow-hop while turning, which may cause tire scuffing.

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

Intermittent shift lock up engagement

1. Shift the vehicle into 4LO Lock or 4HI Lock.
2. Shift the vehicle from 4LO Lock or 4HI Lock to the 4HI mode.
3. Drive the vehicle and inspect for the shift lock up staying engaged after shifting from the 4LO Lock or 4HI Lock to the 4HI Mode. If the shift lock up stays engaged after shifting from 4LO Lock or 4HI Lock, it will give a symptom of both axles driving without any speed difference between the axles. It is noticed by tire scuffing on dry pavement when turning.
4. Drive the vehicle in reverse for a few feet.
5. Drive the vehicle forward and inspect for the shift lock up staying engaged. If the shift lock up disengaged after driving the vehicle in reverse this is normal and no further action is required.
6. Advise the customer to drive the vehicle in reverse for a few feet if the shift lock up does not disengage after shifting out of 4LO Lock or 4HI Lock.

Planetary differential

1. 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

•	Refer to Transfer Case Cleaning and Inspection .

2. Inspect the planetary differential for deformation. Refer to Transfer Case Cleaning and Inspection .
3. Replace the planetary differential assembly if it is faulty. Refer to Transfer Case Disassemble and Transfer Case Assemble .

Thrust washer

1. Inspect the thrust washer for seizure to the planetary differential.
2. Replace the thrust washer if it is faulty and the mating component if it is damaged. Refer to Transfer Case Disassemble and Transfer Case Assemble .

Planetary differential not timed properly

1. Inspect the planetary differential for being timed properly. Refer to Transfer Case Assemble .
2. Properly time the planetary differential gears. Refer to Transfer Case Assemble .