Replacing the radial shaft seal for the torque converter (GA8HP50Z, GA8HP51Z)

Preliminary work 

• Deactivate the 48 v ELECTRICAL SYSTEM .
• Disconnect all battery GROUND LEADS .
• If the active stabilizer is installed: remove FAN COWL .
• Remove the transmission side UNDERBODY PLANKING
• Remove rear UNDERBODY PROTECTION .
• Remove the tunnel connecting SUPPORT .
• If installed: remove the right and left TORSION STRUT where required.
• Remove complete EXHAUST SYSTEM .
• Remove the HEAT SHIELDS .
• Remove the RETAINING PLATES
• Partially loosen the PROP SHAFT
• Remove AUTOMATIC TRANSMISSION  (GA8HP50Z).
• Remove TORQUE CONVERTER .

• Replace screws.

  Parts:  Screws

• To do so, it is essential to use the new parts from the drive repair kit.

  The 13 Torx screws in the drive repair kit are equipped with a sealing ring.

• Replace and hand-tighten the screws (1)  along the dotted line.

  The screws (1)  must be replaced one by one. It is allowed to replace only one screw (1)  at a time.

  Courtesy of BMW OF NORTH AMERICA, INC.

• Tighten screws in the order (1)  to (13)  .
  TIGHTENING TORQUES SPECIFICATION
  
  

  Centering plate on the transmission housing
  M8x74 Replace screws	Joining torque	10 Nm
  	Angle of rotation	90°

  Fig 1: Radial Shaft Seal, Torque Converter, Centering Plate And Screws Tightening Sequence

  Courtesy of BMW OF NORTH AMERICA, INC.
• Install the O-ring on the drive shaft.
• Oil the sealing lip of the radial shaft seal with transmission oil.
• Strike the radial shaft seal (1) with the special tool 0 496 719 (24 1 410) until it reaches the limit position  .

Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work 

• Install the TORQUE CONVERTER .
• Install AUTOMATIC TRANSMISSION  (GA8HP50Z).
• Reconnect all battery GROUND LEADS .
• Check/top up the automatic transmission OIL LEVEL .
• If the active stabilizer is installed: install fan COWL .
• Fasten the (partially removed) PROP SHAFT
• Install the RETAINING PLATES .
• Install the HEAT SHIELDS .
• Install the complete EXHAUST SYSTEM .
• If installed: install the right and left TORSION STRUT where required.
• Install the tunnel connecting SUPPORTS .
• Install rear UNDERBODY PROTECTION .
• Install the transmission side UNDERBODY PLANKING .
• Activate the 48 v ELECTRICAL SYSTEM .