Gear Oil In Center Differential, Changing or Topping Up After Repair

Gear oil in center differential, changing or topping up after repair
Special tools and equipment





^ VAG 1306 drip tray

Procedure
- Drive vehicle onto a 4-column lift or over a work pit.

Note: The vehicle must be on a level surface.

Drain gear oil
- Place VAG1 306 drip tray underneath.





- Removing drain plug (arrow A) and draining gear oil.
- Always replace drain plug.
- Thread in new drain plug (arrow A) again and tighten to 20 Nm.

Filling up gear oil





- If necessary, loosen or remove relevant parts of the exhaust system to gain access to oil filler plug (arrow B).

Note: There is a distinction made between two cases:

A - Center differential was not removed.
B - Center differential was removed
A - Center differential was not removed (e.g. after removing and installing drive flange/drive shaft)





- Remove oil filler plug (arrow B).
- Top up transmission fluid to lower edge of oil filler hole. Specification and capacity.
- Thread in old oil filler plug and tighten to 35 Nm.

Note: If it was necessary to loosen or remove the exhaust system, this must be re-secured or reinstalled for the road test. It must be removed and installed again for the final oil level check.

- Road test vehicle (15 minutes pure driving).

Note: During road test, gear oil enters output cover and Torsion differential; oil level in center differential housing will drop.

- Fill transfer housing with gear oil and check oil level.
B - Center differential was removed and disassembled
- Add 200 ml. gear oil to output cover.
- Center differential, assembling and installing.





- Remove oil filler plug (arrow B).
- Add 600 ml. gear oil to center differential housing.
- Always replace oil filler plug.
- Thread in new oil filler plug and tighten to 35 Nm.

Note: Oil level does not need to be re-checked.

All:
- Secure or re-install exhaust system free of stress.