1. Drain the transfer case oil.
2. Remove the right front drive shaft.
3. Remove the right seal No. 1 of the transfer case.
4. Remove the oil seal using a flathead screwdriver wrapped with electrical tape.
5. Using a mandrel and a hammer, press in a new oil seal.
6. Apply fresh transfer case oil to the lips of the oil seal.
7. Install the right seal No. 1 of the transfer case.
8. Install the right front drive shaft.
9. Fill oil into the transfer case.