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

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IMPORTANT: After completing work, check OIL LEVEL and top up if necessary.
Use only approved oil in this transfer box. See TRANSFER CASE - OPERATING FLUIDS .

Necessary preliminary tasks:

Remove FRONT PROPELLER SHAFT .

Remove protective cap (1) with a screwdriver.

Fig 1: Identifying Protective Cap

G00530613

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 metal shavings from drilling may result in transmission malfunction.

Fig 2: Driving Hole Into Radial Shaft Seal Using Center Punch

G00530614

Courtesy of BMW OF NORTH AMERICA, INC.

Screw in special tool 23 0 490 (puller).

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

Fig 3: Driving Out Radial Shaft Seal With Impact Weight

G00530615

Courtesy of BMW OF NORTH AMERICA, INC.

Drive in radial shaft seal with special tool 27 1 470.

Fig 4: Driving In Radial Shaft Seal With Special Tool 27 1 470

G00530616

Courtesy of BMW OF NORTH AMERICA, INC.

Reassemble the vehicle.

Check OIL LEVEL .

Check transmission for leaks.