Gear Oil Level, Checking, Transfer Case, Transmission With Separated Oil System

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CAUTION:

Risk of damaging transfer case and the front axle differential through incorrect oil level.
Depending on the version there are transmissions with separate or combined oil systems.
For vehicles with combined oil systems the steps for it must be followed, because the oil level from the transfer case and the front axle differential are dependent on one another.
They are differentiated only by the transmission code, refer to TRANSMISSION/ENGINE ALLOCATION .

Special tools and workshop equipment required

Pressurized Gearbox Oil Filler Kit VAS6617
Used Oil Collection and Extraction Unit VAS6622
Protective eyewear

Procedure

Gear oil temperature: approximately 20 °C (68 °F) (room temperature).
The engine must be switched off when working.
Move the vehicle onto a four-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.
Transmission in "P".
The parking brake button should be activated to close the electro-mechanical parking brake.
Tightening specification, refer to OVERVIEW - DRAIN AND INSPECTION PLUGS FOR GEAR OIL .

NOTE:

General repair instructions, refer to GENERAL REPAIR INFORMATION .

Pay attention to clean working conditions for the transmission, refer to CLEAN WORKING CONDITIONS, GUIDELINES .

Follow the disposal requirements.

Replace the ATF drain plug and seal.

Replace the plug for the ATF check and fill hole.

-- Place the Used Oil Collection and Extraction Unit VAS6617 under the transmission.

WARNING:

Danger of eye injury.

Wear protective eyewear.

NOTE:

Place a cloth over the tunnel crossmember to prevent axle oil from getting into the cast pockets on the top.

-- Remove the drain plug -arrow A- from the center differential housing.

Fig 1: Locating Center Differential Housing Fill/Check, And Drain Plugs

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.

If the level does not reach the bottom of the oil fill hole:

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

Courtesy of AUDI OF AMERICA, LLC

-- Install the Pressurized Gearbox Oil Filler - Adapter 6 VAS6617/6 with the Pressurized Gearbox Oil Filler - Adapter 2 VAS6617/2 in the check and fill hole in the transfer case.

NOTE:

After repair or oil change, fill the transfer case with approximately 0.8 liters of gear oil and wait at least five minutes, so that the internal oil level between the center differential and oil fill space can equalize. Then check the fluid level.

-- Install the Pressurized Gearbox Oil Filler Kit VAS6617 and fill the transfer case with required gear oil. Allocate correct gear oil.

-- Wait five minutes.

-- Remove the Pressurized Gearbox Oil Filler - Adapter 6 VAS6617/6 from the transmission and let any extra oil drain out.

Specified value: The oil level is correct when the transfer case is filled up to bottom edge of oil filler hole. Fill the gear oil once more if necessary.

-- Tighten the new drain plug -arrow A- for the center differential housing.

Fig 3: Locating Center Differential Housing Fill/Check, And Drain Plugs

Courtesy of AUDI OF AMERICA, LLC

-- Remove the cloth from the tunnel crossmember.