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

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Special tools and workshop equipment required

Vehicle Diagnostic Tester
Charging Device For Haldex Coupling 2 VAS6291 or Charging Device For Haldex Coupling 2 VAS6291A
Charging Device For Haldex Coupling 2 - Adapter 2 VAS6291/2 or Charging Device For Haldex Coupling 2 - Adapter 3 VAS6291/3
Drip Tray

Test Conditions

The rear final drive must be in the installed position.
The vehicle must be level.
The ATF drain plug is installed and tightened. Tightening specification, refer to -item 15- ATF Drain Plug (See Figure).

CAUTION:

There is a risk of damaging the rear final drive.

Only use ATF available as a replacement part.
Using other fluids can cause malfunctions or final drive failure.
The ATF filler tool must be clean and the ATF must not be mixed with any other oils.

-- Use the Charging Device For Haldex Coupling 2 VAS6291A to fill.

-- Lift the vehicle.

-- Remove the ATF check 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. Identification >>ATF<< on the final drive housing -arrow-

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

Fig 2: Identifying Elbow Adapter

Courtesy of AUDI OF AMERICA, LLC

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

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

-- Route the hose over the left drive axle.

The hose must not sag. It must be routed over the left rear wheel on the vehicle.

-- Lower the vehicle.

-- Make sure that 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

-- Install the oil container -A- on the Charging Device For Haldex Coupling 2 VAS6291A.

-- Open the valve -arrow- and hold the oil container as shown.

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

When the correct filling of the rear final drive hydraulic control module ATF drips from the adapter -A-

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

If there still is no ATF in the adapter -A- :

-- Continue filling until the level is correct.

When ATF starts to leak out of the adapter -A- :

-- Lift the vehicle.

-- Place the oil container for example on a tool box.

A portion of the excess oil runs back into the oil container.

-- If no more ATF runs back, remove the Charging Device For Haldex Coupling 2 VAS6291A.

The oil level is correct when the rear final drive is filled up to the lower edge of the oil 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 the function 22 - AWD Electronics in the Vehicle Diagnostic Tester under Guided Functions in the directory 22- ATF Filling .

Follow all the instructions given by the Vehicle Diagnostic Tester exactly.

The system is filled and bled using the Vehicle Diagnostic Tester.

NOTE:

Repeat the filling process if the system detects there is still air inside the system after performing the 22 - ATF Filling function.

-- 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 filler hole -arrow-.
If necessary fill the ATF.
In the DTC memory there is no entry and no "sporadic malfunction" use the Vehicle Diagnostic Tester.

-- Install the new ATF check plug -arrow- and tighten. Tightening specification, refer to -item 12- ATF Check Plug (See Figure).