27 00 ... Topping up/changing transfer case oil

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

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

Checking/correcting transfer case oil level:

Undo oil filler plug (1).

Check transfer case oil level.

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

Installation:

Tightening torque: 27 00 11AZ, see 27 00 TRANSFER BOX IN GENERAL .

Replace sealing ring.

Place oil collecting apparatus underneath.

Fig 1: Oil Filler Plug And Oil Drain Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Remove oil drain plug (2).

Drain and dispose of gear oil.

NOTE: Observe country-specific waste-disposal regulations

Replace sealing ring, screw in oil drain plug (2) and tighten down.

Tightening torque: 27 00 11AZ, see 27 00 TRANSFER BOX IN GENERAL .

Undo oil filler plug (1).

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

Tightening torque: 27 00 11AZ, see 27 00 TRANSFER BOX IN GENERAL .

Replace sealing ring.