27 21 020 Replacing Radial Shaft Seal For Output Flange (ATC 450)

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:

27 1 440

IMPORTANT: After completing work, check TRANSMISSION OIL LEVEL and top up if necessary.
For this transfer box, use approved transmission oil only.

Necessary preliminary work:

Remove PROPELLER SHAFT .

Release circlip (1).

Fig 1: Output Flange Circlip

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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: Releasing Output Flange With Three-Claw Extractor Tool

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: Output Flange O-Ring

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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: Driving Radial Shaft Seal With Special Tool 27 1 440

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 Screwdrivers
Courtesy of BMW OF NORTH AMERICA, INC.