1. Raise the front of the car and secure it on stands.
2. Remove the driveshaft inner joint from the gearbox.
3. Using a screwdriver or pry bar, remove the O-ring from the gearbox.
4. Using a tubular mandrel of the appropriate diameter, install a new O-ring into the gearbox seat. Lubricate the sealing lips of the new O-ring with multipurpose grease.
5. Install the drive shaft inner joint.