27 21 020 Replacing radial shaft seal for output flange (ATC 450)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2014 BMW X6, 2013 BMW X6, 2012 BMW X6, 2011 BMW X6, and 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

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 PROPELLER SHAFT .

Release circlip (1).

Fig 1: Identifying Retaining Ring

G04745126

Courtesy of BMW OF NORTH AMERICA, INC.

Release output flange with three-claw extractor tool.

Lever radial shaft seal out of housing with a suitable tool.

IMPORTANT: Do not damage housing.

Fig 2: Identifying Output Flange With Three-Claw Extractor Tool

G04745127

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Replace O-ring in output flange.

Check that O-ring is in correct position.

Fig 3: Identifying O-Ring In Output Flange

G04745128

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 1 440.

Fig 4: Identifying Radial Shaft Seal And Special Tool

G04745129

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Push on output flange
Press down output flange using 2 screwdrivers
Shim
Continue pressing output flange down until retaining groove is completely visible
Fit circlip

Fig 5: Pressing Down Output Flange Using Screwdriver

G04745130

Courtesy of BMW OF NORTH AMERICA, INC.