ATF In Rear Final Drive 0BF And 0BE, Filling

Special tools and workshop equipment required

Vehicle Diagnostic Tester
Charging Device F/Haldex 2 Coup. VAS 6291 or Charging Device for Haldex Coupling 2 VAS 6291A
Adapter for Oil Filling VAS 6291/2VAS 6291/2 or Adapter for Oil Filling VAS 6291/3VAS 6291/3
Catch tray

Test Conditions

The rear final drive must be in its installed position.
The vehicle must be horizontal.
Install and tighten the ATF drain plug. Tightening specification REAR FINAL DRIVE OVERVIEW => List Item:ATF Drain Plug.

CAUTION:

Danger of causing damage to the rear final drive.

Only the ATF available as a replacement part may be used.
Using other fluids will cause malfunctions in the rear final drive or will cause the rear final drive to stop working.
The ATF filling tool must be clean. Do not mix ATF with other fluids.

-- Fill using the VAS 6291.

-- Raise the vehicle.

-- Remove the ATF inspection plug -1-.

Fig 1: Locating ATF Plugs

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

The ATF check plug -1- is located on the left side of the rear final drive. >>ATF<< on the final drive housing -arrow-.

-- Disconnect the adapter -A- from the elbow -B-.

Fig 2: Identifying Elbow Adapter

Courtesy of AUDI OF AMERICA, LLC

-- Install the adapter -A- all the way in.

-- Lock the elbow -B- to the adapter -A-.

-- Route the hose over the left drive axle.

The hose must not hang down. It must come out above the left rear wheel.

-- Lower the vehicle.

-- Make sure the valve -arrow- is closed.

Fig 3: Identifying Oil Container On Charging Device F/Haldex 2 Coup. VAS 6291

Courtesy of AUDI OF AMERICA, LLC

-- Attach the oil container -A- to the VAS 6291.

-- Open the valve -arrow- and hold the oil container as illustrated. Refer to Fig 3.

The hydraulic control unit and the left and right chambers in the rear final drive are now filled.

The rear final drive hydraulic control unit is filled correctly when the ATF starts to leak out of the adapter -A-.

Fig 4: Identifying Elbow Adapter
Courtesy of AUDI OF AMERICA, LLC

If ATF still does not leak from adapter -A- :

-- Continue filling until the level is correct.

If ATF does leak out of the adapter -A- :

-- Raise the vehicle.

-- Put down the oil container, for example, on a tool cart.

Some of the excess oil will not run back into the oil container.

-- Disconnect the VAS 6291 when the ATF stops flowing back.

The fluid level is correct when the rear final drive is filled up the lower edge of the fluid fill hole.

-- Install the ATF check plug -arrow- hand-tight.

Fig 5: Locating ATF Check Plug

Courtesy of AUDI OF AMERICA, LLC

-- Connect the vehicle diagnostic tester and turn on the ignition.

-- Select 22 - Fill ATF in the vehicle diagnostic tester under Guided Functions in directory 22 - AWD electronics .

Follow all the instructions on the vehicle diagnostic tester exactly.

The vehicle diagnostic tester fills and bleeds the system.

NOTE:

If, after performing the 22 - Fill ATF , the system detects air still in the system, then the filling procedure must be repeated.

-- Remove the ATF check plug -arrow- again.

Test Condition

The ATF level is correct when the rear final drive is filled up to the lower edge of the fluid fill hole -arrow-.
Fill with ATF if necessary.
There are no entries and no "sporadic" in the Diagnostic Trouble Code (DTC) memory see vehicle diagnostic tester.

-- Install and tighten the new ATF inspection plug -arrow-. Tightening Specifications REAR FINAL DRIVE OVERVIEW => List Item:ATF Check Plug.