CAMPAIGN: FRONT DRIVE AXLE NUT REPLACEMENT
Models/Years: 1989 Toronado and Trofeo Models
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.
SERVICE PROCEDURE (Applies to both left and right front drive axles):
Group 1 (VIN KU300001 - KU300995)
1. Support front of vehicle with floor jack. Lift vehicle just enough to permit the removal of the front wheels (see Section OA of the 1989 Toronado Service Manual for hoisting information).
2. Remove front tire and wheel assembly.
3. Loosen drive axle nut one-sixth turn (one flat).
4. Tighten nut to original position.
5. Check and record torque to re-loosen drive axle nut.
6. If torque in Step (5) is below 80 N.m (60 lbs.ft.), replace hub and bearing assembly and seal per 1989 Oldsmobile Toronado Service Manual procedure, page 3C-6.
NOTICE: If a hub and bearing assembly is replaced, then the two brake caliper to knuckle bolts (P/N 22529144) MUST also be replaced (see NOTICE on page 5B3-1 of Service Manual).
7. Remove drive axle nut and washer and discard.
Proceed with steps (8) through (11), referring to Figure 1., and use Service Kit P/N 3634775.
8. Install splined washer adaptor.
9. Install new washer.
10. Install new torque prevailing nut and torque to 245 N.m (180 lbs.ft.).
IMPORTANT: Use torque wrench to tighten drive axle nut to specification.
11. Install nut retainer over nut and be certain that the three tabs latch into the three notches in the splined washer adaptor. If tabs and notches do not align, tighten nut further to align. Do not exceed 275 N.m (200 lbs.ft.).
12. Install front tire and wheel assembly.
13. Remove support from front of vehicle.
14. Install Campaign Identffication Label.
Group 2 (VIN KU300996 - KU301851)
1. Support front of vehicle wfth floor jack. Lfft vehicle just enough to permit the removal of the front wheels (see Section OA of the 1989 Toronado Service Manual for hoisting information).
2. Remove front tire and wheel assembly.
3. Remove drive axle nut and washer and discard.
For Steps (4) and (5), refer to Figure 2.
4. Install new washer (P/N 10049691).
5. Install new torque prevailing nut (P/N 14035592) and torque to 245 N.m (1 80 lbs.ft.).
IMPORTANT: Use torque wrench to tighten drive axle nut to specification.
6. Install front tire and wheel assembly.
7. Remove support from front of vehicle.
8. Install Campaign identification Label.
CAMPAIGN IDENTIFICATION LABEL
Each label provides space to print the campaign number, and the five (5) digit dealer code of the dealer performing the campaign. Insert this information with a typewriter or ballpoint pen. When installing label, clean and dry the surface of the radiator support tie bar and apply the campaign label where it is readily visible.
PARTS INFORMATION
To ensure parts are obtained as soon as possible, order them from GM Service Parts Operations (GMSPO) on a C.I.O. order, with NO special instruction code, but order on an advise code (2). Use the following part numbers:
NOTICE: Parts must be ordered according to VIN range. Be certain to check the VIN of the vehicle being serviced to obtain the correct parts. Refer to the VEHICLES INVOLVED section of this bulletin.
VIN Range Description Part Number Quantity Per Vehicle --------- ----------- ----------- -------------------- Group 1 Service Kit * 3634775 1
Hub and Bearing Assembly 7466961 As Required * *
Bearing Seal 14084119 As Required * *
Front Brake Caliper 22529144 As Required * * To Knuckle Bolt
Group 2 Torque Prevailing Nut 14035592 2
Large Washer 10049691 2
* NOTICE: Each Service Kit contains 2 Splined Washer Adaptors, 2 Washers, 2 Torque Prevailing Nuts, and 2 Nut Retainers for servicing both the left and right front drive axles.
* * NOTICE: It is anticipated that less than 10% of the wheel bearing assemblies within the Group 1 VIN ranges will require replacement. Bearing assemblies are not included in the Service Kit and must be ordered separately. Please adjust your parts orders accordingly. In addition, brake caliper mounting bracket to knuckle bolts (P/N 22529144) must be replaced when wheel bearing assembly replacement is required (2 per side).
WARRANTY CLAIM INFORMATION
Submit claims using only one of the labor-ops below for each vehicle.
PC PART-NO. TOT-PTS TC LAB-OP LHRS ST SUBLET -- --------- -------- -- ------ ---- -- -------
Group 1:
Install Service Kit Only 96 V5310 .6*
Install Service Kit and One Hub and Bearing Assembly
96 V5311 1.0*
Install Service Kit and Two Hub and Bearing Assemblies
96 V5313 1.5* Group 2:
Install Washers and Nuts 96 V5312 .4*
* .1 hour may be added for clerical administration.
Parts allowance: Current dealer price, plus 30% handling allowance.
Oldsmobile Division is releasing Campaign 89-C-05 involving some 1989 Oldsmobile Toronado and Trofeo model vehicles which may have been assembled with front drive axle nuts that may loosen slightly. If this occurs, the clamp laod for the wheel bearing may decrease resulting in reduced bearing life or bearing failure. 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 VEHTCLES INVOLVED and SERVICE PROCEDURE sections of Product Campaign Bulletin 89-C-05.
Enclosed with this letter are: Two Product Campaign Bulletins 89-C-05. Copy of Owner Letter.
Dealers with vehicles to correct will also receive one Printout of Vehicle Identification Numbers, owner names and addresses in VIN sequence. This data will enable you to follow-up with involved owners.
We urge you to limit the use of these lists to the follow-up needed for this campaign. Names and addresses from State Vehicle Registration files may be included; it is illegal in many states to use such data outside of campaigns.
Your cooperation in completing this campaign as soon as possible will be greatly appreciated.
Records available to Oldsmobile indicate that you are the owner of a 1989 Toronado or Trofeo.
Oldsmobile has determined that your vehicle 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 from occurring on your vehicle, please contact your Oldsmobile dealer to arrange for a service date to have this condition corrected. Your dealer will replace both drive axle nuts and, if necessary, replace affected wheel bearing assemblies. This service will be performed at no charge to you.
Instructions for making this correction have been sent to your Oldsmobile dealer. The labor time to replace both drive axle nuts is about 24 minutes. However, if one or both wheel bearing assemblies must be replaced, an additional one hour may be necessary. Also, please allow additional time for your dealer to process your vehicle.
Please give the enclosed owner reply card to your dealer so they can quickly identify your vehicle and the condition which needs correcting. If you no longer have this vehicle, please let us know by completing the card and mailing it back to us. The postage has been paid for you.
We are sorry for this inconvenience; however, we took this action in the interest of your continued satisfaction with our products.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
