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

Used Oil Collection and Extraction Unit:SMN372500
Pressurized Gearbox Oil Filler Kit:VAS6617
Engine and Gearbox Jack:VAS6931
Engine/Gearbox Jack - Gearbox Support:T10337
Protective Eyewear

Draining

The engine is off.
Move the vehicle onto a four-column workshop hoist or over a work pit so it is completely level.
Transmission is in "P".
The parking brake button is pressed to activate the electro-mechanical parking brake.

NOTE:

General repair instructions. Refer to GENERAL REPAIR INFORMATION .

Guidelines for clean working conditions. Refer to GUIDELINES FOR CLEAN WORKING CONDITIONS .

Follow all applicable disposal regulations.

Replace the drain plug with the gasket.

Replace the plug for the inspection and fill hole.

-- Mount the :T10337 on the :VAS6931 and attach it under the transmission mount.

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-- Slightly lift the transmission with the engine and transmission jack.

-- Remove the bolts -arrows-.

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-- Remove the nuts -arrows- and lower the tunnel crossmember -3- slightly.

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-- Remove the bolt -1- and free up the rear emergency release cable -2-.

-- Place the tunnel crossmember on the :VAS6931 .

-- Place the :SMN372500 under the transmission.

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WARNING:

Danger of eye injury.

Wear protective eyewear.

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

CAUTION:

Risk of damaging the transmission.

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

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

-- Install tunnel crossmember. Refer to TUNNEL CROSSMEMBER, REMOVING AND INSTALLING .

-- Install the parking lock emergency release cable. Refer to FRONT PARKING LOCK EMERGENCY RELEASE CABLE, REMOVING AND INSTALLING .

Filling and Adjusting

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

-- Place the :SMN372500 under the transmission.

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WARNING:

Danger of eye injury.

Wear protective eyewear.

-- Remove the fill/check plug -arrow A- from the center differential housing.

-- Install the :VAS6617/6 with the :VAS6617/2 in the inspection and fill hole in the transfer case hand-tight.

Fig 1: Installing Adapter VAS 6617/6 & Adapter VAS 6617/2 In Inspection & Fill Hole In Transfer Case

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-- Connect the :VAS6617 .

-- Fill the transfer case with approximately 1.0 liters of gear oil.

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.

Specified value: The level is correct when the transmission fluid comes up to the bottom edge of oil filler hole. If necessary, fill with gear oil again.

-- Tighten the new fill/check plug -arrow A- for the center differential housing.

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NOTE:

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

Tightening Specifications

Refer to OVERVIEW - ATF CIRCUIT, DRAIN AND PLUG