A/T - Fluid Leak From The Oil Pan Area
SI B 24 08 06Automatic Transmission
January 2010
Technical Service
This Service Information bulletin supersedes SI B24 08 06 dated February 2009.
[NEW]designates changes to this revision
SUBJECT
ZF 6HP19/6HP26 Transmissions - Mechatronic Sealing Sleeve Leaking
MODEL
E53, E60, E61, E63, E64, E65, E66, E85, E90, E91, E92, E93 with ZF 6-speed 6HP19 or 6HP26 transmission
SITUATION
Transmission fluid leak coming from the area of the transmission oil pan
CAUSE
The Mechatronic sealing sleeve's o-ring leaks.
PROCEDURE
On a customer complaint basis:
1. Drain and save the long-term fill transmission fluid (Shell M-1375.4).
2. Replace the sealing sleeve (P/N 24 34 7 588 725) and the transmission oil pan gasket. Follow Repair Instruction RA 24 34 020.
Important:
Make sure to push the sealing sleeve firmly into the housing assembly before closing the white locking tab of the Mechatronic. To ease the sleeve installation, use some lubrication (e.g., transmission fluid) on both sleeves o-rings.
3. After installation, the correct distance between the transmission harness connector and the housing surface (B) should not exceed 3 mm.
Important:
When installing the transmission harness connector, do use not excessive force - locking of the connector should not require an increased effort. This would be an indication of an incorrectly installed sealing sleeve!!!
4. If the distance between the connector and the transmission housing (A) measures approximately 7 to 8 mm, the sealing sleeve was installed incorrectly. In such a case, an intermittent connection problem between Mechatronic and the vehicle harness connector will occur, resulting in various EGS communication faults (e.g., FC 5079 "Serial wire message missing"; FC 507A "Serial line signal plausibility"; "Gearbox Emergency Program" light illumination; and the transmission entering a failsafe mode).
5. In some cases, the incorrectly installed sealing sleeve may permanently damage pins in the Mechatronic connector (X8500). In such a case, the Mechatronic module has to be replaced (pin repair is not possible).
The illustration shows an example of a broken and missing pin # 4 in the X8500, caused by improper sleeve installation; this resulted in the customer's complaint about the inoperative Sport Mode of the transmission.
IMPORTANT:
Damage to the Mechatronic connector (X8500) pins, caused by an improper installation on the sealing sleeve and a subsequent Mechatronic replacement, is not covered under the BMW warranties.
6. Clean the groove in the plastic oil pan before gasket installation. When reinstalling the oil pan, make sure that the sealing surface of the gasket is oil-free.
Important:
If the sealing surface is not completely dry, the oil pan may still appear to exhibit a minor leak. Follow the torque sequence and specification from RA 24 34 020.
7. On vehicles equipped with a plastic oil pan (all with the exception of the E53), replace the drain plug. Follow the torque specification from RA 24 34 020.
8. Check and top up the transmission fluid level using Shell M-1375.4 (P/N 83 22 0 142 516). For the filling procedure, refer to TIS RA 00 11 500.
9. Warm the engine and test drive the vehicle to verify the effectiveness of the repair.
IMPORTANT NOTE:
In the unlikely event that the transmission fluid leak reappears in the area of the oil pan gasket after completion of the test drive, the transmission oil pan and the gasket need to be replaced.
PARTS INFORMATION
WARRANTY INFORMATION