Drive Axles - Vibration at Idle

CATEGORY
Transmission

SECTION
4

PAGE
29

ISSUE
02/95-0550

CODE
475

Subject:
Correcting Complaint of Vibration At Idle

Application:
900 models with B-W automatic transmission, -1993 (CV, -1994)

Should a customer complain of severe vibration in the drivetrain when a forward gear is selected, but the vibration goes away when reverse gear is engaged, first check the inner drivers for excessive wear. By swapping the drivers left to right (turning the load surfaces around) you should be able to transfer the problem to a complaint of vibration when stationary in reverse. This could help you troubleshoot the problem.

Worn inner drivers should be replaced.





Please note that rebuilt Type 37 B-W transmissions are refurbished with new parts when necessary but sometimes the inner drivers are reused if the rebuilder determines that wear is negligible. The symptom of an idle vibration complaint may arise when installing a new rebuilt transmission if the inner drivers were not replaced.

Cars Affected:

900 models with automatic transmission up to 1993

Parts:

Inner driver 87 22 472

Action:

1. Replace worn inner driver following instructions appearing in Service Manual 4:2 Automatic transmission, p. 475-1.

Warranty Information:

Based on a customer complaint, a warranty claim may be submitted using the following information:

Failure code: 47512-10-3/4-01-01

Labor Operation: 47512 R & R Inner U-Joint, Seal, or Bearing (One side) for 1.2 hr. or

Labor Operation: 47533 R & R Inner U-Joint, Seal, or Bearing (Both sides) for 2.3 hr.