Workshop Hints

Work Shop Hints


NOTE:

- The transmission requires oil replacement every 100,000 miles.
- Contact the BMW Technical Hotline for additional assistance
- Consult the Repair Information (in US) and the Service Information Bulletins regarding static electrical discharge before any repair attempts are made to the Mechatronic Module!
- The oil pan can only be removed at temperatures below 40 °C. The oil pan is made of plastic which will distort at high temperatures.
- Replacement of: external seals, oil sump, torque converter and the Mechatronic as a unit assembly are the only recommended repairs at this time (aside from replacing the complete transmission). No repair attempts should be made to the valve body components (mechanical or electrical) or the electronic control module.


The drain plug is found in the rear of the oil sump. There is a tightening torque value embossed in the drain plug.

When installing the drain plug, observe the tightening torque (8 nm).




Do not overtighten the drain plug because the plug and oil pan will distort or crack!

The inlet oil filter and debris magnets are integral in the oil sump (replaced as a unit).




When installing the oil sump, observe the tightening torque of the bolts.

Do not overtighten the bolts because the oil sump will distort or crack!

The harness plug insulating sleeve must be removed prior to removing the Mechatronic Module from the transmission housing.




The sleeve is released by sliding the lock lever up as shown to the right. The sleeve is then pulled from the transmission housing.

After the sleeve is installed in the transmission housing, the lock lever must be slid down until it locks.

When unbolting the Mechatronic Module for replacement, only the Torx T40 bolts (1) and (2) in the diagram are to be loosened to remove the assembly from the transmission housing (as per the Repair Information).




1. = M6 x 58 mm

2. = M6 x 20 mm

Consult the TIS for the correct tightening torque on installation. When installing the Mechatronic module, make sure that the piston of the parking lock cylinder and the control lever is engaged in the position switch.

Use the Transmission Support (Special Tool) PN 90 88 6 245 306 in conjunction with 88 88 6 002 030 for removal/installation of the complete transmission.