Install the transfer box (ATC 13-1)

• 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.
  Fig 1: Transfer Box Screws Tightening Sequence

  Courtesy of BMW OF NORTH AMERICA, INC.
• Tighten the screws in order from (1) to (5).
  TIGHTENING TORQUES SPECIFICATION
  
  

  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).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Ground strap to transmission or body
  M8	tightening torque	19 Nm

  Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work 

• Refer to CONNECTING ALL BATTERY GROUND LEADS .
• Refer to CHECKING/TOPPING UP THE TRANSFER BOX OIL (ACTIVE TORQUE CONTROL 13-1) .
• Refer to FASTENING THE PROP SHAFT (PARTIALLY REMOVED) .
• Refer to INSTALLING TRANSMISSION CROSS MEMBER .
• Refer to INSTALLING THE RETAINING PLATES .
• Refer to INSTALLING THE HEAT SHIELDS .
• Refer to INSTALLING EXHAUST SYSTEM .
• Refer to INSTALLING CENTER STIFFENING PLATE .
• Refer to INSTALLING TANK COVER ON LEFT AND RIGHT .
• Refer to INSTALLING REAR BUMPER PANEL .
• Refer to INSTALLING BOTH EXHAUST COVERS .
• Refer to INSTALLING THE REAR BUMPER TRIM .
• Refer to INSTALLING THE REAR DIFFUSER .
• Refer to INSTALLING THE TAIL LIGHT ON THE LEFT AND RIGHT SIDE PANELS .
• Refer to INSTALLING COVER FOR WATER CHANNEL ON LEFT AND RIGHT .
• Refer to INSTALLING THE LUGGAGE COMPARTMENT WHEEL ARCH TRIM PANEL ON THE LEFT AND RIGHT (PARTIALLY REMOVED) .
• Refer to INSTALLING LOADING EDGE TRIM .
• Refer to INSTALLING LUGGAGE COMPARTMENT FLOOR COVERING .
• Refer to INSTALLING THE UNDERBODY PLANKING OF THE TRANSMISSION ON THE SIDE .
• Refer to INSTALLING THE STIFFENING PLATE .
• Refer to INSTALLING THE UNDERBODY PROTECTION OF THE STEERING GEAR OR THE FRONT THRUST FIELD .
• Refer to INSTALLING UNDERBODY PROTECTION AT REAR .
• Refer to INSTALLING FRONT UNDERBODY PROTECTION .
• Refer to ENCODING/PROGRAMING CONTROL UNIT(S) .