O-Rings, Gaskets And Seals

Always replace the O-rings, gaskets and seals.
Fill the space between the sealing lips halfway with sealing grease for seal -G 052 128 A1- before installing the radial shaft seal.

Fig 1: Identifying Oil Seals Sealing Lips
Courtesy of VOLKSWAGEN UNITED STATES, INC.
The open side of the seal faces the oil.
Check the transmission fluid level after installing.

CAUTION:

Be cautious when dealing with transmission fluid. Dispose of the drained fluid properly. Bear in mind that: One drop of transmission fluid can contaminate 1000 liters of drinking water.