Campaign - Front Drive Axle Nut Replacement: Overview
89Oldsmobile10Subject: Front Drive Axle Nut Replacement
Models/Years: 1989 Toronado
and Trofeo Models
Number 89-C-05
Date: September 1989
Section: 4C
CONDITION
General Motors has determined that some 1989 Oldsmobile Toronado and Trofeo model vehicles may have been assembled with front drive axle nuts that may loosen slightly. If this occurs, the clamp load for the wheel bearing may decrease. Although wheel retention and steering control will not be affected, this condition could result in noisy front wheel bearings and lead to reduced bearing life.
To prevent this condition from occurring, dealers will be required to replace both front drive axle nuts on all affected vehicles. In addition, on some vehicles dealers are to inspect and replace, if necessary, affected wheel bearing assemblies. Specifics are detailed in the VEHICLES INVOLVED and SERVICE PROCEDURE sections of this bulletin.
VEHICLES INVOLVED
All 1989 Toronado and Trofeo model vehicles within the following VIN breakpoints:
Group 1 Group 2
Beginning Through and Including Beginning Through and Including
KU300001 KU300995 KU300996 KU301851
There are 955 vehicles in Group 1, and 856 vehicles in Group 2 for a total of 1851 vehicles affected.
EACH GROUP ABOVE HAS A SEPARATE SERVICE PROCEDURE.
Group 1 vehicles should require LESS THAN 10% of the wheel bearing assemblies to be replaced.
Group 2 vehicles should NOT require any wheel bearing assembly replacement.
DEALER ACTION
Dealers are to service all vehicles involved in this campaign, at no charge to owners, regardless of mileage, age of vehicle, or ownership.
Whenever a vehicle subject to this campaign is taken into your new or used car inventory, or it is in your dealership for service, you are to ensure the campaign correction has been made before selling or releasing the vehicle.
Dealers are to contact owners of vehicles recently sold from your new vehicle inventory and arrange for the campaign correction to be performed.