27 21 020 Replacing radial shaft seal for output flange (ATC 700)

WARNING: This page is about a different car, the 2013 BMW X5 M, 2012 BMW X5 M, 2011 BMW X5 M, and 2010 BMW X5 M. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

23 0 490 (Puller)
27 1 480

IMPORTANT: After completing work, check GEAR OIL LEVEL and top up if necessary.
Use only approved transmission oil for this transfer box. See TRANSFER BOX - OPERATING FLUIDS .

Necessary preliminary tasks:

Remove PROPELLER SHAFT .
Release exhaust system bracket.
Remove CROSS MEMBER .

Fig 1: Identifying Circlip

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Release circlip (1).

Installation note:

Replace O-ring in output flange.

Check that O-ring is in correct position.

Fig 2: Identifying O-Ring

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IMPORTANT: The transmission shaft may move when the output flange is pushed on. The circlip can thus no longer be fitted.

Installation note:

Push on output flange.
Using 2 screwdrivers, press output flange downwards or output shaft (2) upwards until groove for circlip is completely visible.
Fit circlip.

Fig 3: Pressing Output Flange Downwards Using 2 Screwdrivers
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Drive a hole into radial shaft seal (1) using a centre punch (2).

IMPORTANT: Do not use a drill as drillings may result in transmission malfunction.

Fig 4: Driving Hole Into Radial Shaft Seal Using Centre Punch

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Screw in special tool 23 0 490 (Puller).

Drive out radial shaft seal (1) with impact weight (2).

Fig 5: Driving Out Radial Shaft Seal With Impact Weight Using Special Tool (23 0 490 - Puller)

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Drive in radial shaft seal with special tool 27 1 480

Fig 6: Driving In Radial Shaft Seal Using Special Tool (27 1 480)

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Reassemble the vehicle.

Check oil level.

Check transmission for leaks.