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

Special tools and workshop equipment required 

• Used Oil Collection and Extraction Unit:SMN372500 
• Pressurized Gearbox Oil Filler Kit:VAS6617 
• Protective Eyewear
• Protective gloves

Procedure 

• Gear oil temperature: approximately 20 °C (68 °F) (room temperature).
• Move the vehicle onto a 4-column workshop hoist or over a work pit so it is completely level.
• Transmission is in "P".
• The parking brake button is pressed to activate the electro-mechanical parking brake.
• The transmission must be still for at least 15 minutes to make sure the oil settles internally.

• General repair instructions. Refer to GENERAL REPAIR INFORMATION .
• Guidelines for clean working conditions. Refer to GUIDELINES FOR CLEAN WORKING CONDITIONS .
• Replace the plug for the inspection and fill hole.

-- Place the :SMN372500  under the transmission.

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-- To catch escaping gear oil place multiple cloths around the tunnel crossmember.

-- Remove the drain plug -1- from the center differential housing.

• Specified value: The oil level is correct when the transfer case is filled to the lower edge of the filler opening.

-- Let any excess oil drain.

If the Level in the Transfer Case Does Not Reach the Lower Edge of the Oil Fill Hole:

-- Install the :VAS6617/6  with the :VAS6617/2  in the inspection and fill hole in the transfer case hand-tight.

-- Connect the :VAS6617  and fill the transfer case with gear oil.

• Transmission fluid. Refer to the Parts Information.

-- Wait five minutes.

Tip:

• The inside of the transfer case is divided into several oil chambers. The chambers must be filled equally.
• A waiting time of at least 5 minutes is required so that the internal oil level between the center differential and oil fill space can equalize.

-- Remove the :VAS6617/6  from the transmission and let any extra gear oil drain out.

-- Tighten the new drain plug -1- for the center differential housing.

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-- Remove the cloth from the tunnel crossmember.

Tightening Specifications

• Refer to Drain and Plug