Gear Oil Level In Transmission, Transmissions With Combined Oil Systems, Checking

Gear Oil Level in Transmission, Transmissions with Combined Oil Systems, Checking

Special tools, testers and auxiliary items required

• Used Oil Collecting and Extracting Device (V.A.G 1782)

• Engine/Transmission Jack (V.A.G 1383 A)

• Transmission Fluid Hand Pump (VAS 6617)

• Protective eyewear

Conditions

• Axle oil temperature approximately 20 °C (68 °F) (room temperature) to max. 50 °C (122 °F).

• Vehicle level.

• The vehicle may not be started or towed without axle oil in it.

• The oil spaces in the front final drive - 6 - and in the transfer case - 3 - are consolidated. Therefore, they must always be checked and filled together.





• Both insufficient filling and overfilling affect the transmission function.

• Follow all applicable disposal regulations.

Procedure

• Follow all applicable disposal regulations.

• Automatic transmission clean working conditions, refer to => [ Clean Working Conditions ] Clean Working Conditions.

• General repair instructions, refer to => [ General Repair Information ] General Repair Information.

- Remove both rear noise insulators by loosening bolts - 2 -, - 3 - and - 4 -.






For the following steps, note:

Do not support on the transmission oil pan or damage could result.

- Install an M12 x 100 bolt - 1 - with a nut - 2 - into the rear mount on the transmission fluid pan.





• - a - = 13 mm

- Position (V.A.G 1383 A) on bolt head and slightly raise transmission, as shown in illustration.

- Remove the sound proofing bracket from underneath the ATF cooler.

- If present, remove the electrical connector brackets - 1 - and - 2 - for the oxygen sensors from the tunnel crossmember - arrows -.





- Mark the installed position of the transmission tunnel crossmember on the body.

- Remove the left - 1 - and right - 2 - transmission bolts on tunnel crossmember.





- Remove the transmission tunnel crossmember from the body - arrows -.





- Lower or raise transmission accordingly with (V.A.G 1383 A) until transmission is horizontal in installation position again.

• The transmission must be level to check the axle oil.

• It must be raised or lowered accordingly with the (V.A.G 1383 A) after removing the tunnel crossmember.

- Slide tunnel crossmember as far back as possible so that transfer case oil inspection and filler plug - arrow - are accessible.





- Place the (V.A.G 1782) under the transmission.


Wear protective eyewear.

- Remove transfer case oil inspection and filler plug - arrow -.

• The transfer case oil inspection and filler plug is located at the side of the transfer case housing and is installed from below - arrow -.





• In the illustration, the transfer case is partially from behind so that the axle oil level with filler opening is visible.

- Remove front final drive oil inspection and filler plug - arrow -.





Axle oil capacities, refer to => [ Specifications ] Table of Contents

- Fill the front final drive with axle oil using the (VAS 6617) until the axle oil reaches the lower edge of the oil filler hole - arrow -.

- Slowly add axle oil into the transfer case housing through the oil filler hole on the transfer case - arrow - with the (VAS 6617).





After removing the hose, a small amount of axle oil always escapes and stands in the oil channel above the bolt.

If axle oil then drains lightly from the opening, the oil level in the transfer case is correct.

If no axle oil comes out:

- Add axle oil again until oil level is correct.

- Allow extra axle oil to drain out the oil filler hole until the oil level in the transfer case is correct.

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

- Always replace oil inspection and filler plug.

Install all components in reverse sequence; note the following points:

- Install tunnel crossmember. Refer to => [ Tunnel Crossmember ] Tunnel Crossmember

Tightening Specifications