Install the transfer case (ATC 13-1)

• Lightly grease the gearing (1)  in the transfer case (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 case (VTG).

  Parts:  O-ring

• Apply a thin coat of grease to the gearing of the output flange in the transfer case (VTG).
  CONSUMABLE SPECIFICATION
  
  

  Ball bearing grease

  100 g, Tube

  81229407174

  Courtesy of BMW OF NORTH AMERICA, INC.

• Position the transfer case (VTG) with the help of a support person.
• Position the front prop shaft (1)  on the output flange (3)  of the transfer case (VTG).
• Align the front prop shaft (1)  with the help of the marks (2)  and (4)  .
• Install the transfer case (VTG) and, at the same time, slide the front prop shaft (1)  into the output flange (3)  of the transfer case (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)  .
  Fig 1: Transfer Case Screws Tightening Sequence

  Courtesy of BMW OF NORTH AMERICA, INC.
  TIGHTENING TORQUES SPECIFICATION
  
  

  Transfer case 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 TRANSMISSION CROSS MEMBER .
• Refer to INSTALLING THE HEAT SHIELDS .
• Refer to INSTALLING EXHAUST SYSTEM .
• Refer to INSTALLING THE REAR TUNNEL CONNECTING SUPPORT .
• Refer to INSTALLING THE REINFORCEMENT STRUT .
• Refer to INSTALLING THE REAR DIFFUSER .
• Refer to INSTALLING TANK COVER ON LEFT AND RIGHT .
• Refer to ACTIVATING VEHICLE ELECTRICAL SYSTEM .
• Refer to CHECKING/TOPPING UP THE TRANSFER CASE OIL (ACTIVE TORQUE CONTROL 13-1) .