27 21 020 Replacing radial shaft seal for output flange (ATC 35L)
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2018 BMW 328d xDrive, 2017 BMW 328d xDrive, 2016 BMW 328i xDrive, 2016 BMW 328d xDrive, and 2016 BMW 320i 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 TRANSMISSION OIL LEVEL and top up if necessary.
Use only the approved transmission oil.
Use only the approved transmission oil.
Necessary preliminary tasks:
- Partially remove propeller shaft
. See 26 11 000 COMPLETELY REMOVING AND INSTALLING PROPELLER SHAFT (INSERTED - REAR FLEXIBLE DISC) (WITHOUT VIBRATION ABSORBER)
, 26 11 000 REMOVING AND REFITTING COMPLETE PROPELLER SHAFT (PUSH-FIT - FLEXIBLE JOINT AT REAR) (WITH VIBRATION ABSORBER)
or 26 11 000 REMOVING AND INSTALLING PROPELLER SHAFT (INSERTED) COMPLETELY
.
- 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 box.
Release circlip (1).
Release output flange with three-claw extractor tool.
Lever radial shaft seal out of housing with a suitable tool.
IMPORTANT:
Do not damage housing.
Installation note:
Replace O-ring in output flange.
Check that O-ring is in correct position.
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.
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.