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

WARNING: This page is about a different car, the 2010 BMW X5, 2009 BMW X5, 2008 BMW X5, and 2007 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 tasks:

Remove propeller shaft. See 26 11 000 REMOVING AND INSTALLING PROPELLER SHAFT (INSERTED) COMPLETELY .

Release circlip (1).

Fig 1: Release Circlip (1)

G00497033

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: Lever Radial Shaft Seal Out Of Housing With A Suitable Tool

G00497034

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: Replace O-Ring In Output Flange

G00497035

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: Drive In Radial Shaft Seal With Special Tool 27 1 440

G00497036

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

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: Press Down Output Flange Using 2 Screwdrivers

G00497037

Courtesy of BMW OF NORTH AMERICA, INC.