Gaskets, Seals, And O-Rings

WARNING: This page is about a different car, the 2017 Volkswagen Touareg, 2016 Volkswagen Touareg, and 2015 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.

Replace the O-rings, sealing rings and seals.
Once a seal or gasket has been removed, check contact surface on housing or shaft for burrs and damage and repair as necessary.
Before installing a sealing ring, apply a thin coating of ATF to the periphery and the sealing lip depending on the installation location.

Fig 1: Identifying Oil Seal Sealing Lips
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
Only use ATF in the ATF area. Other types of lubrication cause faults to occur in the transmission hydraulics.
The open side on the seals faces the oil.
Check the ATF level. Refer to ATF LEVEL, CHECKING AND FILLING .