2721010 Replacing radial shaft seal for drive flange (ATC 300): Notes

WARNING: This page is about a different car, the 2011 BMW 328xi, 2010 BMW 335xi, 2010 BMW 328xi, 2009 BMW 335xi, and 2009 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: After completion of work, CHECK GEAR OIL LEVEL and top up if necessary.
Use only the approved gear oil in the transfer case. See TRANSFER BOX - OPERATING FLUIDS .

Necessary preliminary tasks:

Remove TRANSFER BOX .

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: Making Hole Into Radial Shaft Seal Using Center Punch

G04745123

Courtesy 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: Removing Radial Shaft Seal With Impact Weight

G04745124

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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

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

Fig 3: Installing Radial Shaft Seal

G04745125

Courtesy of BMW OF NORTH AMERICA, INC.

Add final details to vehicle.

Check oil level.

Check transmission for leaks.