The drive pinion seal must only be renewed once.
Do not work on or under a vehicle supported only by a jack. Always support the vehicle on safety stands.
This step must be carried out to make sure that the drive pinion nut is correctly tightend on assembly.
Make sure only a bolt is used with the special tool, to draw the drive pinion flange off the drive pinion shaft.
Make sure the drive pinion flange scribed marks are aligned.
Make sure the mark on the drive pinion nut is never tightened short of the scribed mark on the drive pinion shaft.
Make sure the drive pinion flange has no end float and is free to rotate.
Make sure the scribed mark on the drive pinion nut is no more than a maximum of 5 degrees past the scribed mark on the drive pinion shaft.
Make sure the correct specification and quanity of oil is used.