27 21 030 Replacing radial shaft seal for output to the front axle (ATC 450)

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Special tools required:

23 0 490
27 1 470
83 30 2 318 114

IMPORTANT: After completion of the repair work, check gearbox oil level.
For these transfer boxes, use approved TRANSMISSION OIL only.

Necessary preliminary tasks:

Remove front PROPELLER SHAFT .

Remove protective cap (1) with a screwdriver.

Fig 1: Removing Protective Cap

G09958718

Courtesy of BMW OF NORTH AMERICA, INC.

Drive a hole into radial shaft seal (1) using a center punch (2).

IMPORTANT: Do not use a drill as swarf may result in transmission malfunction.

Fig 2: Removing Radial Shaft Seal

G09958719

Courtesy of BMW OF NORTH AMERICA, INC.

Screw in special tool 23 0 490.

Drive out radial shaft seal (1) with impact weight (2).

Fig 3: Identifying Special Tool (23 0 490)

G09958720

Courtesy of BMW OF NORTH AMERICA, INC.

Drive in radial shaft seal with special tool 27 1 470 or 83 30 2 318 114. (Observe diameter of radial shaft seal)

Fig 4: Identifying Special Tool (27 1 470)

G09958721

Courtesy of BMW OF NORTH AMERICA, INC.

Reassemble the vehicle.

Check oil level.

Check gearbox for leaks