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Home >> BMW >> 2017 >> X3 sDrive28i >> Repair and Diagnosis >> External Pages >> Different car >> Section 387 (Transfer Case - Repair) >> Transmission Shafts >> 27 21 010 Renewing Radial Shaft Seal For Drive Flange (ATC 45L)

27 21 010 Renewing Radial Shaft Seal For Drive Flange (ATC 45L)

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required: 

IMPORTANT: After completion of work, CHECK TRANSMISSION OIL LEVEL  and top up if necessary.
For this transfer box, use approved transmission fluid oil only.

Necessary preliminary tasks: 

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

IMPORTANT: Do not use a drill as drillings may result in transmission malfunction.
Fig 1: Driving Hole Into Radial Shaft Seal Using Center Punch
G04745123Courtesy of BMW OF NORTH AMERICA, INC.

Screw special tool 23 0 490 into radial shaft seal.

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

Fig 2: Driving Out Radial Shaft Seal With Impact Weight
G04745124Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Coat sealing lips of new radial shaft seal with clean transmission oil.

Drive in radial shaft seal with special tool 27 1 430.

Fig 3: Driving Radial Shaft Seal With Special Tool 27 1 430
G04745125Courtesy of BMW OF NORTH AMERICA, INC.

Reassemble the vehicle.

Check oil level.

Check transmission for leaks.