27 00... Replenishing/Changing Transfer Case Oil (ATC 350)

IMPORTANT: Use only the approved transmission oil in the transfer box .
Failure to comply with this requirement will result in serious damage to the transfer box!

NOTE: Only change oil when transfer box is at normal operating temperature.

Necessary preliminary tasks:

Remove transmission cross-member . See 22 32 050 REPLACING CROSS-MEMBER FOR TRANSMISSION MOUNTING (N57) AWD , 22 32 050 REPLACING THE CROSS MEMBER FOR THE TRANSMISSION MOUNTING (N20, N55, N47) ALL-WHEEL DRIVE VEHICLE or 22 32 050 REPLACING CROSS-MEMBER FOR TRANSMISSION MOUNTING (N63) AWD .

Checking/correcting transfer case oil level:

Undo oil filler plug (1).

Check transfer box oil level.

If necessary, pour in transmission oil up to lower edge of opening for oil filler plug (1).

Installation note:

Tightening torque: 27 10 2AZ .

Replace oil filler plug (1).

Fig 1: Oil Filler Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Changing transfer box oil:

Remove exhaust system holder from transmission.

Tightening torque: 18 20 1AZ (N63) , 18 20 1AZ (N57) , 18 20 1AZ (N20) or 18 20 1AZ (N55) .

Place oil collecting apparatus underneath.

Remove oil drain plug (1).

Drain and dispose of transmission oil.

NOTE: Observe country-specific waste disposal regulations.

Fig 2: Oil Drain Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Replace oil drain plug (1).

Tightening torque: 27 10 2AZ .

Undo oil filler plug (1).

Pour in transmission oil up to lower edge of opening for oil filler plug (1).

Tightening torque: 27 10 2AZ .

Replace oil filler plug (1).

Fig 3: Oil Filler Plug

Courtesy of BMW OF NORTH AMERICA, INC.