27 10 730 Replacing transfer box control unit (longitudinal torque module) (ATC 35L)

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Special tools required:

IMPORTANT: Before and after replacement, execute the "Repair" service function with the BMW diagnosis system.
READ AND COMPLY WITH NOTES ON PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) .

Necessary preliminary tasks:

Disconnect BATTERY NEGATIVE LEAD .
Remove cross member . See 22 32 050 REPLACING CROSS MEMBER FOR TRANSMISSION MOUNTING, ALL-WHEEL DRIVE or 22 32 050 REPLACING CROSS-MEMBER FOR TRANSMISSION MOUNTING (N47) AWD .

Disconnect connector (1).

Release screws (3) and remove transfer box control unit (longitudinal torque module) (2).

Tightening torque 27 10 3AZ .

Installation note:

Replace O-ring.

NOTE: Radial shaft seal of actuator shaft must be replaced as well.

Fig 1: Identifying Transfer Box Control Unit Screws (Longitudinal Torque Module) And Connector

G08495706

Courtesy of BMW OF NORTH AMERICA, INC.

Thread special tool 23 0 490 into radial shaft seal (1).

Drive out radial shaft seal (1) with impact weight (2).

Fig 2: Driving Out Radial Shaft Seal With Impact Weight

G08504531

Courtesy of BMW OF NORTH AMERICA, INC.

Push the assembly sleeve 11 1 380 over the actuator shaft.

IMPORTANT: Nonobservance involves a risk of damage to the radial shaft seal.

Fig 3: Pushing Assembly Sleeve (11 1 380)

G08504532

Courtesy of BMW OF NORTH AMERICA, INC.

Slide the new radial shaft seal (1) over the assembly sleeve (2) onto the actuator shaft.

Fig 4: Sliding Radial Shaft Seal Onto Actuator Shaft

G08504533

Courtesy of BMW OF NORTH AMERICA, INC.

Drive radial shaft seal fully home using special tool 11 1 200 and plastic hammer.

Remove the assembly sleeve.

Fig 5: Driving Radial Shaft Seal Onto Actuator Shaft

G08504534

Courtesy of BMW OF NORTH AMERICA, INC.

After replacement:

CARRY out programming/encoding.