O-rings, seals, gaskets

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2008 Audi S4, 2008 Audi RS 4, 2007 Audi S4, 2007 Audi RS 4, and 2006 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.

Always replace O-rings, gaskets and seals.
After removing gaskets, examine contact surface on housing/shaft for burr resulting from removal or for other signs of damage.
Thoroughly clean housing joint surfaces before assembling.

Fig 1: Identifying Space Between Oil Seal Sealing Lips

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Before installing radial shaft seals, lightly oil outer circumference and fill space between sealing lips - arrow - halfway with sealing grease G 052 128 A1 .
Open sides of oil seals face fluid side.
When pressing in new gaskets, make sure sealing lip does not run on the same point as the sealing lip of the old seal (use insertion depth tolerances).
Lightly oil O-rings before installing; this prevents the rings from being crushed when inserting.

The procedure for removing and installing shaft seals in an installed transmission is described in → 34 CONTROLS, HOUSING and →
- 39 FINAL DRIVE, DIFFERENTIAL for REAR FINAL DRIVE
- 39 - FINAL DRIVE, DIFFERENTIAL for REAR FINAL DRIVE 0AR
.
After replacing seals and sealing rings, check transmission fluid level and top off if necessary → 34 CONTROLS, HOUSING .