How to Change an Output Shaft Seal

What You'll Need
Jack
Jack Stands
Socket Wrench
Nut Driver with Square Bits
Pry Bar
Bucket

Changing the output shaft seal is a project that a do-it-yourself mechanic can do at home, with the right hand tools. Here are some of the steps involved.

Step 1: Jack Car Up

Jack the car up and place it on jack stands. All 4 wheels should be set on jack stands, as the car needs to be level in order to change the output shaft seal.

Step 2: Drain Transfer Case Fluid

Once the car is lifted in the air, drain out the transfer case fluid. Place a bucket under the drain plug, and use a square bit to remove the drain plug.

Step 3: Remove Drive Shaft

Use the socket set, and loosen the bolts on the drive shaft. Remove it from the output shaft of the transfer case.

Step 4: Remove Output Flange

After the driveshaft has been removed, you will see the output flange. Remove the 1 nut that holds it in place, and remove it from the transfer case.

Step 5: Remove and Change Output Shaft Seal

The output shaft seal is located in the housing around the output shaft. Remove this with a pry bar or a seal puller. Make sure not to scratch the shaft. Install the new seal and replace the flange and drive shaft. Fill with new transfer case fluid and lower the vehicle.