Gear Oil Level, Checking, 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
Protective Eyewear

Procedure

Gear oil temperature: approximately 20 °C (68 °F) (room temperature).
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.
The transmission must be still for at least 15 minutes to make sure the oil settles internally.

NOTE:

General repair instructions. Refer to GENERAL REPAIR INFORMATION .

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

Replace the plug for the inspection and fill hole.

-- Place the :SMN372500 under the transmission.

Courtesy of AUDI

NOTE:

To catch escaping gear oil place multiple cloths around the tunnel crossmember.

WARNING:

Danger of eye injury.

Wear protective eyewear.

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

Specified value: The oil level is correct when the transfer case is filled to the lower edge of the filler opening.

-- Let any excess oil drain.

If the Level in the Transfer Case Does Not Reach the Lower Edge of the Oil Fill Hole:

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

Courtesy of AUDI

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

-- Connect the :VAS6617 and fill the transfer case with 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.

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

Courtesy of AUDI

-- Remove the cloth from the tunnel crossmember.

Tightening Specifications

Refer to OVERVIEW - ATF CIRCUIT, DRAIN AND PLUG