Gear Oil, Checking Level, Transfer Case

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Procedure

Gear oil temperature at approximately 20 °C (68 °F) (room temperature).
Move the vehicle onto a 4-column shop 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.
Tightening specification. Refer to OVERVIEW - CENTER DIFFERENTIAL .

NOTE:

General repair instructions. Refer to GENERAL REPAIR INFORMATION .

Clean working conditions for the automatic transmission. Refer to GUIDELINES FOR CLEAN WORKING CONDITIONS .

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

WARNING:

Danger of eye injury.

-- Remove the locking bolt -arrow- on the side of the center differential housing.

Fig 1: Identifying Inspection Plug

Courtesy of AUDI OF AMERICA, LLC

Specified value: The level is correct when the transmission fluid comes up to the bottom edge of oil filler hole.

-- Allow the excess gear oil to drain if necessary.

-- Add gear oil if necessary until it runs out of the gear oil filler hole.

-- Repeat the process in steps every 15 seconds with 50 ml of gear oil until the transfer case stops accepting gear oil.

NOTE:

The inside of the transfer case is divided into several oil chambers. The waiting period is necessary to ensure they are all filled evenly.

Replace the drain plug and gasket.

-- Tighten the new sealing plug.