DEFINITION: A faulty internal transfer case component that causes a whine noise in the transfer case.

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

Faulty bearings

1. Inspect all of the bearings and journals. Refer to Transfer Case Cleaning and Inspection.
2. Replace any faulty bearings and any components with faulty bearing journals. Refer to Transfer Case Disassemble and Transfer Case Assemble.

Worn or loose chain

1. Inspect for a loose chain, excessive wear on the snubber, or deep gouges in the lining.
2. Replace the chain, sprockets, and snubber. Refer to Transfer Case Disassemble and Transfer Case Assemble.