Necessary preliminary tasks

• Remove TRANSFER BOX 

Release retaining ring (1).

Fig 1: Identifying Retaining Ring

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Release output flange with three-claw extractor tool.

Lever radial shaft seal out of housing with a suitable tool.

Fig 2: Removing Output Flange Using Three-Claw Extractor Tool

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Installation: 

Replace O-ring in output flange.

Check that O-ring is in correct position.

Fig 3: Identifying O-Ring

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Installation: 

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: Installing Radial Shaft Seal Using Special Tool 27 1 440

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Installation: 

• Push on output flange
• Press down output flange using 2 screwdrivers
• Fit washer
• Continue pressing output flange down until retaining groove is completely visible
• Fit retaining ring
  Fig 5: Pressing Down Output Flange Using Screwdrivers

  Courtesy of BMW OF NORTH AMERICA, INC.