A/T - Hard Shifts/Leak at Torque Converter Seal

GROUP 24
Automatic Transmissions

24 02 02

Woodcliff Lake, NJ
Service Engineering

April, 2002

SUBJECT
A5S360/390R; Hard Shifts, Leak at Torque Converter Seal

MODEL
Z3 with GM5 from 6/00 up to 7/01
E39 with GM5 from 9/99 up to 7/01
E46 and E46xi with GM5 from 6/98 up to 7/01

SITUATION

1. All shifts very hard.

2. Noise from transmission oil pump.

3. Hard shifts with FC30 (mechanical torque converter clutch monitoring) in EGS fault memory. A combination of 1 - 3 above.

4. Transmission fluid leak from radial seal on torque converter.

CAUSE

Situation 1 - 3: Improper alignment of sliding seal in pump. From start of production to July 2001, transmission serial numbers 55000-209255.

Situation 4: Improper alignment of torque converter guide sleeve in pump. From start of production to transmission serial number 413022.

CORRECTION
Determine affected parts, replace as necessary.

PROCEDURE

1. Remove transmission oil pan and check condition of oil. Oil should not smell burnt or be excessively contaminated with wear particles.

2. Remove transmission and check torque converter for ease of movement. Torque converter should rotate easily.





Remove torque converter and check sliding surface of radial oil seal on torque converter shaft for signs of wear (grooves).

If above checks are OK:

Replace transmission torque converter housing with oil pump, using special torque converter housing repair kit. Part number 24 40 7 520 492. Refer to repair instructions 24 40....

If torque converter shaft is grooved;

Replace transmission torque converter housing with oil pump (P/N 24 40 7 520 492), and torque converter (refer to EPC). Refer to repair instructions 24 40....

If transmission oil smells burnt, is heavily contaminated with wear particles, or torque converter is difficult to turn:

Replace transmission.

Note:
Technical Hotline authorization is required for the replacement of any GM5 transmission.





PARTS INFORMATION








WARRANTY INFORMATION

Covered under the terms of the BMW New Vehicle Limited Warranty.