27 21 010 Replacing radial shaft seal for drive flange (ATC 350)

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required

23 0 490
27 1 430

IMPORTANT: After completing work, check TRANSMISSION OIL LEVEL and top up if necessary.
Use only the APPROVED OIL .

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

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: Driving Out Radial Shaft Seal Using Special Tool (23 0 490)

Courtesy 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: Installing Radial Shaft Seal Using Special Tool (27 1 430)

Courtesy of BMW OF NORTH AMERICA, INC.

Reassemble the vehicle.

Check TRANSMISSION OIL LEVEL .

Check transmission for leaks.