Drivetrain - Drive Shaft Area Noises
SI B26 01 06Drive Shaft
June 2007
Technical Service
This Service Information Bulletin supersedes S.I. B26 01 06 dated June 2006. The same information can also be found in Service Information Bulletin B24 14 07 dated June 2007.
[NEW] designated changes to this revision
SUBJECT
Noise from Driveshaft Area
MODEL
E65 and E66 (7 Series) 745i and 745Li with N62 Engine and 6HP26 Transmission
Vehicles produced from 10/22/2002 up to 3/2005
SITUATION
One or more of the following complaints may be received from the customer while driving slowly, coming to a stop or at highway speeds:
^ A clunk can be heard while rolling slowly and downshifting from 2nd to 1st gear coming to a stop.
^ Load reversal causes a slight clunk noise.
^ A clunk noise can be heard while shifting into forward or reverse gear from park or neutral.
CAUSE
A deterioration or separation of the rubber in the universal joint located between the transmission and drive shaft assembly.
PROCEDURE
In order to determine if the noise is caused by a defective universal joint the driveshaft must be removed from the vehicle. Once removed the metal collars can be checked for looseness or separation from the rubber material. If the metal collars are found to be loose and cracking in rubber is found then replace the universal joint with P/N 26 11 7 542 238.
Shown are some of indications of wear found in the universal joint assembly.
Cracking can be found in the rubber material that secures the steel collar.
The collar can be rotated without resistance.
NEW Important Note:
After replacement of the defective universal joint, make sure to clear transmission adaptation values (not the "learned values"), and test drive vehicle to verify effectiveness of the repair.
PARTS INFORMATION
[NEW] WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.
Disclaimer