27 10 010 Removing and installing transfer case (ATC 350)

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Special tools required:

IMPORTANT: Before and after replacement, execute the "Repair" service function with the BMW diagnosis system.

IMPORTANT: After completion of work, CHECK TRANSMISSION OIL LEVEL and top up if necessary.
Failure to comply with this requirement will result in serious damage to the transfer case!

Necessary preliminary work:

Disconnect BATTERY EARTH LEAD .
Remove UNDERBODY PROTECTION .
Remove COMPLETE EXHAUST SYSTEM .
Remove heat shields
Disconnect PROPELLER SHAFT at gearbox, release center mount.
Tie back propeller shaft to underbody
Important:
An excessive deflection angle of the propeller shaft may damage the joint/propeller shaft!
Support gearbox with jack when removing the transfer case.

Release screws.

Tightening torque 26 11 7AZ .

Remove front propeller shaft at output flange of transfer case and tie to one side.

Installation note:

Replace screws.

Fig 1: Locating Front Propeller Shaft Mounting Screws

G04745103

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Support transmission with special tools 00 2 030 , 23 4 050 .

Fig 2: Support Transmission Using Special Tools (00 2 030, 23 4 050)

G04745104

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Remove cooling air duct (2).

Fig 3: Identifying Cooling Air Duct And Mounting Screws

G08488083

Courtesy of BMW OF NORTH AMERICA, INC.

Undo bolts (1) for gearbox mount.

Tightening torque 22 32 10AZ .

Fig 4: Identifying Gearbox Mounting Bolts

G08495640

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws.

Remove transmission cross member.

Tightening torque 22 32 3AZ .

Tightening torque 22 32 6AZ .

Fig 5: Locating Transmission Crossmember Mounting Screws

G04745107

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect connector (1) from transfer case control unit (linear force module) (2).

Fig 6: Identifying Transfer Case Control Unit And Connector

G08495706

Courtesy of BMW OF NORTH AMERICA, INC.

Slightly lower gearbox.

Release screw connection of transfer case.

Tightening torque 27 10 1AZ .

Remove transfer case.

Installation note:

Pay attention to dowel pin (1).

Grease dowel pin (1).

Apply a thin coat of grease to gearing.

Grease: WEICON ANTI-SEIZE.

Fig 7: Identifying Dowel Pin

G04745108

Courtesy of BMW OF NORTH AMERICA, INC.