Necessary preliminary tasks

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Remove rear underbody protection
Remove EXHAUST SYSTEM
Remove heat shields
Support transmission with special tools 23 4 050 and 23 0 132
Remove TRANSMISSION CROSSMEMBER
Remove TRANSFER CASE

Mount special tool 24 4 320 and secure with hook wrench (1).

Screw in spindle (2) until radial shaft seal is released.

Fig 1: Identifying Hook Wrench And Spindle

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Coat sealing lips of new radial shaft seal with clean transmission oil.

Drive in radial shaft seal with special tool 24 4 330 until it stops.

Fig 2: Driving-In Radial Shaft Seal With Special Tool 24 4 330

Courtesy of BMW OF NORTH AMERICA, INC.