General Repair Information: Components

Rear Final Drive

Allocate bolts and other components according to final drive code .
When replacing the rear final drive, check the gear oil level (refer to GEAR OIL LEVEL IN REAR FINAL DRIVE 0BF AND 0BE, CHECKING ) and the ATF level in the final drive (refer to ATF LEVEL IN REAR FINAL DRIVE 0BF AND 0BE, CHECKING ).
Capacities and specifications. Refer to CODES, TRANSMISSION ALLOCATION, RATIOS AND CAPACITIES .
Clean the contact surfaces when installing brackets and waxed components. Contact surfaces must be free of wax and grease.
Thoroughly clean the connection points and the surrounding area before loosening.

ATF and Gear Oil

Rear final drive 0BF and 0BE works with separated oil chambers for the ATF and gear oil.

For the hydraulics (hydraulic control unit and left and right chambers) use only ATF which can be obtained as replacement part. Refer to appropriate FLUID CAPACITY TABLE information in MAINTENANCE article.
For the final drive (gear set, differential) use only the gear oil which can be obtained as replacement part. Refer to appropriate FLUID CAPACITY TABLE information in MAINTENANCE article.
Other ATF or gear oil can cause function problems.

CAUTION:

Gear oil and ATF change Audi RS5

Oil, Environmental and Disposal Regulations

Sealant

Thoroughly clean the housing separating surfaces before applying the sealing compound.
Apply Sealing CompoundD 176 501 A1 evenly and not too thick.
Keep the sealant from getting into the bleed holes or into the oil channels.

Shaft Seals

Lightly coat the shaft seal on the outer diameter with oil before installing.
The open side on the shaft seals faces the fluid to be sealed off.
After replacing any of the shaft seals, check the gear oil level (refer to GEAR OIL LEVEL IN REAR FINAL DRIVE 0BF AND 0BE, CHECKING ) or the ATF level in the final drive (refer to ATF LEVEL IN REAR FINAL DRIVE 0BF AND 0BE, CHECKING ).

Shaft Seal for the Flange/Driveshaft

Fig 1: Identifying Oil Seal Sealing Lips

Courtesy of AUDI OF AMERICA, LLC

Fill the space between the sealing lips -arrow- halfway with Sealing GreaseG 052 128 A1.

Flange Shaft Seals

Fig 2: Identifying Oil Seal

Courtesy of AUDI OF AMERICA, LLC

O-Rings, Gaskets and Seals

O-rings, gaskets and seals must always be replaced.
After removing the seals, examine the contact surface on the housing or shaft for burrs resulting from removal or for other signs of damage.
Thoroughly clean the housing separating surfaces before assembling.
Lightly lubricate the O-rings before inserting to prevent the rings from being crushed during assembly.
After replacing any of the gaskets, seal and O-rings, check the Gear oil level (refer to GEAR OIL LEVEL IN REAR FINAL DRIVE 0BF AND 0BE, CHECKING ) or the ATF level in the final drive (refer to ATF LEVEL IN REAR FINAL DRIVE 0BF AND 0BE, CHECKING ).

Retainers

Do not stretch the circlips.
Always replace damaged or stretched circlips.
The circlips must rest at the bottom of the groove.
Replace the adapter sleeves. Installation position: the slot -A- should align with the line of force -arrow-.

Fig 3: Identifying Circlips Position
Courtesy of AUDI OF AMERICA, LLC

Bolts and Nuts

Always loosen or tighten bolts and nuts on covers and housings diagonally.
Parts which are particularly sensitive must not be tilted and must be loosen or tighten diagonally in stages.
The tightening specifications given apply to unoiled bolts and nuts.
Always replace self-locking bolts and nuts.
Clean the threads of bolts that were applied with locking fluid using a wire brush (does not apply to driveshaft bolts: these must be replaced). Then insert the bolts with Locking Fluid AMV 185 101 A1.
If self-locking bolts were installed or if bolts were installed with locking fluid, then the threaded holes must be cleaned, for example with a thread tap. Otherwise there is the risk that the bolts could break off the next time they are removed.