Gear Oil, Draining And Filling, Transmission With Combined Oil System

WARNING: This page is about a different car, the 2023 Audi SQ8, 2023 Audi RS Q8, and 2023 Audi Q8. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Pressurized Gearbox Oil Filler Kit:VAS6617
Used Oil Collection and Extraction Unit:SMN372500
Protective Eyewear

Draining

Gear oil temperature: approximately 20 °C (68 °F) (room temperature).
The engine must be switched off when working.
Move the vehicle onto a four-column workshop hoist or over a work pit so it is completely level.
The transmission must be still for at least 15 minutes to make sure the oil settles internally.
Transmission in "P".
The parking brake button is pressed to activate the electro-mechanical parking brake.

Tip

Pay attention to the general repair information. Refer to GENERAL REPAIR INFORMATION .
Pay attention to clean working conditions for the transmission. Refer to GUIDELINES FOR CLEAN WORKING CONDITIONS .
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.

WARNING:

Danger of eye injury.

Wear protective eyewear.

Tip

Place a cloth over the tunnel crossmember to prevent axle oil from getting into the cast pockets on the top.

-- Remove the drain plug -arrow B- from the front final drive and drain the transmission fluid.

Fig 1: Identifying Drain Plug From Front Final Drive

Courtesy of AUDI

-- Tighten the new drain plug on the front final drive -arrow B-.

-- Remove the drain plug -arrow B- from the center differential housing and drain the transmission fluid.

Fig 2: Drain Gear Oil From Transfer Case

Courtesy of AUDI

-- Tighten the new drain plug on the center differential housing -arrow B-.

Filling and Adjusting

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

-- Place the :SMN372500 under the transmission.

-- Remove the fill/check plug -arrow A- from the front final drive.

Fig 3: Identifying Drain Plug From Front Final Drive

Courtesy of AUDI

-- Install the :VAS6617/6 with :VAS6617/2 in the front final drive inspection hole hand tight and fill the front final drive with approximately 1.0 liters (1.05 quarts) of gear oil.

Fig 4: Installing Adapter VAS 6617/6 & Adapter VAS 6617/2 Into Transmission Hand-Tight

Courtesy of AUDI

Transmission fluid. Refer to the appropriate Parts Information.

-- Wait five minutes.

-- Remove the :VAS6617/6 from the transmission and let any extra gear oil drain out.

-- Install the old fill/check plug.

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

Fig 5: Drain Gear Oil From Transfer Case

Courtesy of AUDI

-- Install the :VAS6617/6 with :VAS6617/2 in the transfer case inspection hole -arrow A- hand tight and fill the transfer case with approximately 1.0 liters (1.05 quarts) of gear oil.

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

Courtesy of AUDI

Transmission fluid. Refer to the appropriate Parts Information.

-- Wait five minutes.

NOTE:

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

A waiting 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 :VAS6617/6 from the transmission and let any extra gear oil drain out.

-- Install the old plug.

-- Perform a road test for 10 to 15 minutes.

NOTE:

The fluid distributes evenly during the road test.

-- Check the gear oil level and fill. Refer to ATF LEVEL, CHECKING, TRANSMISSION WITH COMBINED OIL SYSTEM .

Tightening Specifications

Refer to OVERVIEW - ATF CIRCUIT, DRAIN AND PLUG