Install the transfer box (ATC 13-1)

• Apply a thin layer of grease to the gearing (1) in the transfer box (VTG) and the gearing (2) on the automatic transmission.
  CONSUMABLE SPECIFICATIONS
  
  

  Ball bearing grease

  100 g, Tube

  81229407174

  Courtesy of BMW OF NORTH AMERICA, INC.

• Replace the O-ring (1) before installing the front prop shaft in the transfer box (VTG).

  Parts:  O-ring

• Apply a thin coat of grease to the gearing of the output flange in the transfer box (VTG).
  BALL BEARING GREASE SPECIFICATIONS
  
  

  100 g, Tube

  81229407174

  Consumable

  Courtesy of BMW OF NORTH AMERICA, INC.

• Position the transfer box (VTG) with the help of a support person.
• Position the front prop shaft (1) on the output flange (3) of the transfer box (VTG).
• Align the front prop shaft (1) with markings (2) and (4).
• Install the transfer box (VTG) and at the same time slide the front prop shaft (1) into the output flange (3) of the transfer box (VTG).
• Remove any leaked grease on the prop shaft.

  Courtesy of BMW OF NORTH AMERICA, INC.

  NOTE: TECHNICAL INFORMATION 
  When assembling, it is essential to observe screwing sequences and tightening torques.
  Failure to comply with the regulations can lead to leaks and damage.
• Tighten screws in the order (1) to (5).
  Fig 1: Transfer Box To Automatic Transmission Nuts Tightening Sequence

  Courtesy of BMW OF NORTH AMERICA, INC.
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Transfer box to automatic transmission
  M10	tightening torque	43 Nm

• Connect the connector (1) on the VTG control unit (longitudinal torque distribution) (2).

  Courtesy of BMW OF NORTH AMERICA, INC.

• Install the ground strap (2).
• Tighten down screw (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work 

• Refer to FASTENING THE PROP SHAFT (PARTIALLY REMOVED) .
• Refer to INSTALLING THE CONNECTING SUPPORTS ON THE TUNNEL .
• Refer to INSTALLING TRANSMISSION CROSS MEMBER .
• Refer to CONNECTING ALL BATTERY GROUND LEADS .
• Refer to CHECKING/TOPPING UP THE TRANSFER BOX OIL (ACTIVE TORQUE CONTROL 13-1) .
• Refer to INSTALLING THE RETAINING PLATES .
• Refer to INSTALLING THE HEAT SHIELDS .
• Refer to INSTALLING EXHAUST SYSTEM .
• Refer to INSTALLING THE LEFT AND RIGHT REAR DIFFUSER .
• Refer to INSTALLING THE RIGHT REAR TENSION STRUT .
• Refer to INSTALLING THE STIFFENING PLATE .
• Refer to INSTALLING FRONT UNDERBODY PROTECTION .
• Refer to INSTALLING UNDERBODY PROTECTION AT REAR .