27 21 020 Replacing radial shaft seal for output flange (ATC 35L)

WARNING: This page is about a different car, the 2018 BMW 330i xDrive and 2017 BMW 330i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required :

27 1 440

IMPORTANT: After completing repair work, check GEARBOX OIL LEVEL and top up if necessary.
Use only the approved transmission oil. See TRANSFER CASE - OPERATING FLUIDS .

Necessary preliminary tasks :

Partially remove PROPELLER SHAFT :
- Disconnect propeller shaft at transmission.
- Release center mount.
- Tie up propeller shaft to underbody.
  NOTE: Bending the propeller shaft by an excessive angle can cause premature damage to the joint/propeller shaft!
Support gearbox with jack when removing the transfer case.

Removal:

Release circlip (1).

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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.

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Installation:

Replace O-ring in output flange.

Check that O-ring is in correct position.

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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.

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Installation note :

Push on output flange
Press output flange towards the bottom using 2 screwdrivers.
Mount shim.
Continue pressing output flange towards the bottom until retaining groove is completely visible.
Fit circlip.

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Required follow-up work:

Install PROPELLER SHAFT .