27 21 030 Replacing radial shaft seal for output to the front axle (ATC 350)

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2015 BMW Alpina B7L xDrive, 2015 BMW Alpina B7 xDrive, 2015 BMW 750i xDrive, 2015 BMW 750Li xDrive, and 2014 BMW Alpina B7L xDrive. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: After completion of work, CHECK TRANSMISSION OIL LEVEL .
Use only the APPROVED OIL .

Necessary preliminary work:

Remove rear UNDERBODY PROTECTION .
Remove left holder for underbody protection.
Remove exhaust system holder from transfer case.

Tightening torque 18 20 2AZ .

Release screws.

Tightening torque 26 11 7AZ .

Remove front propeller shaft at output flange of transfer case and tie to one side.

Installation note:

Replace screws.

Fig 1: Locating Front Propeller Shaft Mounting Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Lever output flange (1) out of housing with screwdriver (2).

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

IMPORTANT: Do not damage housing.

Fig 2: Removing Output Flange Out Of Housing Using Screwdriver

Courtesy of BMW OF NORTH AMERICA, INC.

Drive in radial shaft seal with special tool 27 1 450.

Fig 3: Driving In Radial Shaft Seal Using Special Tool (27 1 450)

Courtesy of BMW OF NORTH AMERICA, INC.