Repair Information

Carefulness, cleanliness and the correct tools are required for transmission repairs to be successful. The usual basic safety precautions also, naturally apply when carrying out vehicle repairs.

A number of generally applicable instructions for individual repair operations are summarized here. They apply to this repair information.

Transmission 

• Automatic transmission clean working conditions, refer to CLEAN WORKING CONDITIONS .
• With the transmission removed, secure the torque converter so that it cannot fall out.
  Fig 1: Securing Torque Converter

  Courtesy of AUDI OF AMERICA, LLC
• Always only use approved ATF or Vaseline. Other types of lubrication cause faults to occur in the transmission hydraulics.
• The old transmission should be installed and put into operation as quickly as possible to prevent corrosion on the newly installed components.
• Check and fill all fluids after installing. Capacities and specifications, refer to SPECIFICATIONS .

Dirt Near the ATF 

Heavy dirt near the ATF caused by worn friction linings:

• Disassemble the transmission completely and clean.
• Disassemble the clutches and check them.
• Replace the torque converter (because it cannot be cleaned).
• Replace the Mechatronic (it cannot be cleaned).
• Clean the ATF lines and ATF cooler, and then replace the ATF filter.

O-rings, Seals, Shaft Seals and Gaskets 

• O-rings, seals, shaft seals and gaskets must be replaced.
• After removing gaskets, examine contact surface on housing/shaft for burr resulting from removal or for other signs of damage.
• The open side of the shaft seals point toward the fluid to be sealed in.
• To install, thinly coat shaft seals along outer circumference and on sealing lip with ATF.
• Coat O-rings with transmission fluid or Vaseline before inserting to prevent crushing rings during installation.
• Always only use approved ATF or Vaseline. Other types of lubrication cause faults to occur in the transmission hydraulics.
• Press in new shaft seal, so that the sealing lip does not run on the same point as the sealing lip of the old shaft seal (use insertion depth tolerances).
• Remove the old seals completely, clean the sealing surfaces thoroughly and replace the seals.

Bolts and Nuts 

• Loosen the bolts opposite the tightening sequence.
• Nuts and bolts which secure covers and housings should be loosened and tightened crosswise in stages if no tightening sequence is specified.
• The tightening specifications stated apply to non-oiled nuts and bolts.
• Always replace self-locking nuts and bolts.

Fasteners 

Fig 2: Identifying Spring Pins

Courtesy of AUDI OF AMERICA, LLC

• Do not overstretch the circlips.
• Always replace damaged or stretched circlips.
• The circlips must fit completely inside the groove.
• Replace the adapter sleeves. Installed position: Slit is longitudinal to direction of force -arrow-.

Bearings 

• Coat bearing with ATF before inserting.
• Only use Vaseline for the bearing and adjusting ring. Other types of lubrication lead to faults in the transmission hydraulics.

Oil Pipes 

• Oil pipes must be replaced if the transmission is extremely contaminated.