GM Service Manual Online
For 1990-2009 cars only

Transfer Case Leak Diagnosis

Cause

Correction

Leaking differential side seals

  1. Remove transfer case.
  2. Replace differential side seals.

Leak around pinion flange

Replace pinion seal.

Leaking drain and/or fill plugs

  1. Inspect for sealer and proper torque.
  2. Drain the fluid.
  3. Clean the plugs.
  4. Replace the sealer.
  5. Fill the transfer case with fluid.