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Home >> Audi >> 2025 >> S4 Premium >> Repair and Diagnosis >> Drivelines & Axles >> Differentials & Drive Axles >> Final Drive, Differential (7-Speed Dual Clutch Transmission 0CK, 0CJ, 0DP, 0DN) >> 39 Final Drive, Differential >> Seals >> Left Seal, Replacing >> Installing

Left Seal, Replacing: Installing

Install in the reverse order of removal while noting the following:

-- Always clean the transmission housing in the area where the differential is accessed -arrow A- and the shaft seal seat -arrow B-.

Fig 1: Carefully Set Down Electro-Drive Drive Motor
GWWA30-10177Courtesy of AUDI OF AMERICA, LLC

-- Lightly coat the new shaft seal on the outer edge with oil and slide on to the Seal Installer - Flange Shaft :T40164  .

Fig 2: Install Seal Using T40164
GWWA39-10257Courtesy of AUDI OF AMERICA, LLC

Conditions

-- Install the shaft seal all the way. Be careful not to bend it.

-- Fill the space between the sealing and dust lip halfway with sealing grease.

-- Install the differential -arrow-.

GWWA39-10762Courtesy of AUDI OF AMERICA, LLC

-- Replace the O-ring -A- on the front final drive cover and coat it with transmission fluid.

Fig 3: Identifying Final Drive Cover O-ring
GWWA39-10285Courtesy of AUDI OF AMERICA, LLC

-- Insert the final drive cover and tighten the bolts -arrows-.

GWWA39-10761Courtesy of AUDI OF AMERICA, LLC

-- Install the left flange shaft. Refer to Left Flange Shaft, Removing and Installing  .

-- Install the right flange shaft. Refer to Right Flange Shaft, Removing and Installing  .

-- Install the left and right input shafts. Refer to DRIVE AXLE, REMOVING AND INSTALLING .