Front Axle Differential Lock Fluid Level, Checking

Front axle differential lock fluid is available as a replacement part. Refer to the Parts Information.

Special tools and workshop equipment required 

• Digital Thermometer: VAS 6519 
  Fig 1: Identifying Digital Thermometer VAS 6519

  Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
• Used Oil Collection and Extraction Unit: SMN372500 
  Fig 2: Identifying Used Oil Collection And Extraction Unit

  Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Replace oil filler plug after removing.

Test Requirements

• Observe the safety information.
• Use a Digital Thermometer: VAS 6519  to measure the oil temperature.
• The oil temperature must be 20 to 40 °C.
• The vehicle must be level.
• Front axle differential lock must be in installed position to check oil level.

Oil Level, Checking 

Fig 3: Checking Oil Level

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Place the Used Oil Collection and Extraction Unit: VAS 6622A  under the front axle differential lock.

-- Remove the oil filler plug -arrow-.

• The oil level is correct when it fills up to the lower edge of the oil fill hole.

-- Install a new oil filler plug -arrow- and tighten it to the tightening specification.

-- Add oil if the oil level is not correct. Refer to FRONT AXLE DIFFERENTIAL LOCK FLUID, DRAINING AND FILLING .

Tightening Specification 

• Oil filler plug. Refer to Front Axle Differential Lock Components .