Gear oil in transfer case, topping off after repair

WARNING: This page is about a different car, the 2010 Audi A8, 2009 Audi A8, 2008 Audi A8, 2007 Audi A8, and 2004 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required

Fig 1: Drip Tray V.A.G 1306

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Drip tray V.A.G 1306
Safety glasses

Test conditions

Gear oil temperature at approx. 20° C (room temperature).
The cover was removed from transfer case and all gear oil was thereby drained.

Test sequence

To ensure vehicle is absolutely level, drive onto a 4-column lifting platform or over a service pit.
Place drip tray V.A.G 1306 underneath transmission.

CAUTION: Wear eye protection.

Fig 2: Inspection Plug

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove inspection plug - arrow -.

NOTE:

The engine must not be started and the vehicle must not be towed if there is no gear oil in the transmission!

Slowly and evenly fill transfer case with gear oil over a period of at least 5 minutes (specification → Transfer case ).

NOTE:

A filling time of at least 5 minutes is required so that the internal oil level between the self-locking center differential and oil fill space can equalize.
Sealing plug with sealing ring must be replaced.

Tighten new sealing plug to 35 Nm.

NOTE:

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