Gear Oil, Draining And Filling, Transfer Case, Transmission With Separated Oil System

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Special tools and workshop equipment required

Used Oil Collection and Extraction Unit VAG1782
Pressurized Gearbox Oil Filler Kit VAS6617
Protective eyewear

Draining

The engine is off.
Move the vehicle onto a four-column shop hoist or over a work pit so it is completely level.
Gear oil temperature: approximately 20 °C (68 °F) (room temperature).
Tightening specifications, refer to OVERVIEW - DRAIN AND INSPECTION PLUGS FOR GEAR OIL .

NOTE:

General repair instructions, refer to GENERAL REPAIR INFORMATION .

Clean working conditions for the automatic transmission, refer to CLEAN WORKING CONDITIONS, GUIDELINES .

Follow the disposal requirements.

Replace the ATF drain plug and seal.

Replace the plug for the ATF check and fill hole.

-- Place the Used Oil Collection and Extraction Unit SMN372500 under the transmission.

Fig 1: Locating Center Differential Housing Fill/Check, And Drain Plugs

Courtesy of AUDI OF AMERICA, LLC

WARNING:

Danger of eye injury.

Wear protective eyewear.

-- Remove the drain plug -arrow B- and drain the transmission fluid.

CAUTION:

Danger of causing damage to the transmission.

Do not start the engine when there is no ATF in the transfer case.

-- Tighten the new drain plug -arrow B-.

Filling and Adjusting

Gear oil temperature: approximately 20 °C (68 °F) (room temperature).

-- Place the Used Oil Collection and Extraction Unit SMN372500 under the transmission.

WARNING:

Danger of eye injury.

Wear protective eyewear.

-- Remove the drain plug -arrow A- from the center differential housing.

Fig 2: Locating Center Differential Housing Fill/Check, And Drain Plugs

Courtesy of AUDI OF AMERICA, LLC

-- Install the Pressurized Gearbox Oil Filler - Adapter 6 VAS6617/6 with the Pressurized Gearbox Oil Filler - Adapter 2 VAS6617/2 in the check and fill hole in the transfer case.

Fig 3: Installing Adapter VAS 6617/6 & Adapter VAS 6617/2 In Inspection & Fill Hole In Transfer Case

Courtesy of AUDI OF AMERICA, LLC

-- Connect the Pressurized Gearbox Oil Filler Kit VAS6617 and fill the front final drive with approximately 0.8 liters of gear oil.

Gear oil specification, allocate correct fluid.

-- Wait five minutes.

NOTE:

The inside of the transfer case is divided into several oil chambers. The chambers must be filled equally.

A filling time of at least 5 minutes is required so that the internal oil level between the center differential and oil fill space can equalize.

-- Remove the Pressurized Gearbox Oil Filler - Adapter 6 VAS6617/6 from the transmission and let any extra oil drain out.

Specified value: The oil level is correct when the transfer case is filled up to bottom edge of oil fill hole. Fill the gear oil once more if necessary.

-- Tighten the new drain plug -arrow A- for the center differential housing.

Fig 4: Locating Center Differential Housing Fill/Check, And Drain Plugs

Courtesy of AUDI OF AMERICA, LLC

NOTE:

It is not necessary to check the oil level again at this stage.