Install the transfer box (ATC13-1)

• Lightly grease the gearing (1) in the transfer box (VTG) and the gearing (2) of the automatic transmission.
  CONSUMABLE SPECIFICATION
  
  

  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).
  CONSUMABLE SPECIFICATION
  
  

  Ball bearing grease

  100 g, Tube

  81229407174

  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 the help of the marks (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 the screws in order from (1) to (5).
  TIGHTENING TORQUE SPECIFICATION
  
  

  Transfer box to automatic transmission
  M10	tightening torque	43 Nm

  Fig 1: Transfer Box To Automatic Transmission Screws Tightening Sequence

  Courtesy of BMW OF NORTH AMERICA, INC.
• 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).
  TIGHTENING TORQUE SPECIFICATION
  
  

  Ground strap to transmission or body
  M8	tightening torque	19 Nm

  Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work 

• Refer to INSTALLING TRANSMISSION CROSS MEMBER .
• Refer to FASTENING THE PROP SHAFT (PARTIALLY REMOVED) .
• Refer to INSTALLING THE HEAT SHIELD .
• Refer to INSTALLING THE COMPLETE EXHAUST SYSTEM .
• Refer to INSTALLING THE CONNECTING SUPPORTS ON THE TUNNEL .
• Refer to RECONNECTING ALL BATTERY GROUND LEADS .
• Refer to CHECKING/TOPPING UP THE TRANSFER BOX OIL (ACTIVE TORQUE CONTROL 13-1) .
• Refer to INSTALLING UNDERBODY PROTECTION AT REAR .
• Refer to INSTALLING THE CENTER UNDERBODY PROTECTION .