Repair Information: Components

Rear Final Drive 

• Allocate bolts and other components according to final drive code .
• When installing, check the oil level in the rear final drive (Refer to GEAR OIL, CHECKING LEVEL .) and the ATF level (Refer to .) and fill if necessary.
• Capacities and specifications. Refer to 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.

Oil, Environmental and Disposal Regulations 

• Handle ATF, transmission fluid and other oils with care.
• Dispose of drained fluid properly.
• Follow the legal environmental and disposal regulations.
• Follow the instructions listed on the fluid packaging.

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.
• For the final drive (gear set, differential) use only the gear oil which can be obtained as replacement part.
• Other ATF or gear oil can cause function problems.
  CAUTION:

  Gear oil and ATF fluid change. 

  • For some RS models the gear oil as well as the ATF must be changed.
  • Refer to MY 2016 MAINTENANCE INTERVALS - USA for the change interval.
  • For all other vehicles there is no change interval.

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, CHECKING LEVEL .) or the ATF level in the final drive .

Shaft Seal for the Flange/Driveshaft 

Fig 1: Identifying Oil Seal

Courtesy of AUDI OF AMERICA, LLC

• Fill the space between the sealing lips -arrow- halfway with Sealing Grease G 052 128 A1.

Flange Shaft Seals 

Fig 2: Identifying Oil Seal

Courtesy of AUDI OF AMERICA, LLC

• Coat the space between the sealing lips -arrow- with ATF.

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, CHECKING LEVEL .) or the ATF level in the final drive .

Retainers 

Fig 3: Identifying Circlips

Courtesy of AUDI OF AMERICA, LLC

• 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-.

Bolts and Nuts 

Fig 4: Identifying Nut And Bolt

Courtesy of AUDI OF AMERICA, LLC

• 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 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 regular 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.