Transfer Case Oil Leak Repair - Tracker Transfer Case

Once the leak has been located, its cause must be determined in order to carry out the proper repair. For example, if a case component is resealed but the mating surface is damaged, resealing will not repair the leak. The damaged mating surface must be repaired or replaced. Before any repairs are attempted, however, always check for the following conditions:

Important:
- The transfer case does not use gaskets to seal major case components. GM P/N 12346240, or equivalent, should be used where applicable.
- Oil level is too high.
- Plugged breather vent.
- Improperly tightened fasteners, dirty or damaged threads.
- Warped flanges or mating surfaces.
- Scratches, burrs or other damage to mating surfaces.
- Insufficient or excessive amounts of sealer.
- Cracking or porosity of the component.
- Improper sealant used where applicable.
- Damaged seal bore.
- Damaged or worn seal.
- Scratched, nicked or damaged propeller shaft surfaces.
- Loose or worn bearing causing excessive seal wear.