For 1990-2009 cars

# INFO. ON NEW DESIGN (2ND DESIGN)

#### SUBJECT: INFORMATION ON NEW DESIGN (2ND DESIGN) FRONT WHEEL BEARING/FRONT WHEEL SPEED SENSOR

#### MODELS: 1992-93 BUICK RIVIERA 1992-95 BUICK LESABRE, PARK AVENUE 1995 BUICK RIVIERA 1992-93 CADILLAC ALLANTE 1992-95 CADILLAC CONCOURS, DEVILLE, FLEETWOOD, ELDORADO, SEVILLE 1992-95 CHEVROLET LUMINA APV 1992 OLDSMOBILE TORONADO, TROFEO 1992-95 OLDSMOBILE EIGHTY EIGHT, NINETY EIGHT, SILHOUETTE 1995 OLDSMOBILE AURORA 1992-95 PONTIAC BONNEVILLE, TRANS SPORT

#### INFORMATION:

ON JANUARY 3, 1995, A NEW DESIGN FOR THE FRONT WHEEL HUB AND BEARING AND THE FRONT WHEEL SPEED SENSOR WAS PHASED INTO PRODUCTION ON ALL OF THE ABOVE-LISTED 1995 VEHICLES THAT HAVE ANTI-LOCK BRAKES.

THE 1ST DESIGN (PREVIOUSLY USED) HUB AND BEARING ASSEMBLY (HUB AND BEARING W/SENSOR) IS NO LONGER AVAILABLE AS A SERVICE PART. THE 2ND DESIGN HUB AND BEARING ASSEMBLY WILL FIT ALL VEHICLES WHEN HUB AND BEARING REPLACEMENT IS NECESSARY. HOWEVER, THE 1ST DESIGN WHEEL SPEED SENSOR IS STILL AVAILABLE TO SERVICE ANY VEHICLES WITH 1ST DESIGN HUB AND BEARING WHERE ONLY A WHEEL SPEED SENSOR REPLACEMENT IS NEEDED.

THE 1ST DESIGN SENSOR SERVICE KIT P/N IS 10457144. THE 2ND DESIGN SENSOR SERVICE KIT P/N IS 10457282. THE VISUAL DIFFERENCE BETWEEN THE SENSORS CAN BE IDENTIFIED BY THE SLINGER RING AT THE OUTSIDE OF THE SENSOR. THE 1ST DESIGN SENSOR SLINGER RING IS RAISED. THE 2ND DESIGN SENSOR SLINGER RING IS ABOUT FLUSH WITH THE SENSOR HOUSING. SEE ATTACHED ILLUSTRATION.

REPLACING THE WHEEL SPEED SENSOR -

#### NOTICE: INSTALLATION OF AN INCORRECT WHEEL SPEED SENSOR WILL RESULT IN PREMATURE BEARING FAILURE. REFER TO THE ATTACHED ILLUSTRATION TO DETERMINE WHICH WHEEL SPEED SENSOR KIT IS REQUIRED.

#### NOTICE: THE NEW STYLE (2ND DESIGN) WHEEL SPEED SENSOR REQUIRES THE USE OF A NEW SPECIAL TOOL TO PRESS THE SENSOR ONTO THE HUB AND BEARING. THE NEW KENT-MOORE TOOL J-38764-4 MUST BE USED TO INSTALL THE (2ND DESIGN) SENSOR ONTO THE (2ND DESIGN) HUB AND BEARING. FAILURE TO USE THE PROPER INSTALLATION TOOL WILL CAUSE DAMAGE TO THE SENSOR, HUB AND BEARING.

#### IMPORTANT: WHEN REPLACING THE WHEEL SPEED SENSOR, DO NOT ALLOW DIRT OR OTHER FOREIGN MATERIAL TO FALL INTO BEARING. ALSO, DO NOT ADD OR REMOVE WHEEL BEARING GREASE. THE WHEEL BEARING IS PERMANENTLY LUBRICATED AND GREASE CONTAMINATION OR EXCESSIVE GREASE MAY CAUSE THE BEARING TO FAIL LATER. THE PRESENCE OF GREASE ON THE TOOTHED SENSOR RING INSIDE THE BEARING ASSEMBLY IS NORMAL AND DOES NOT AFFECT SENSOR OPERATION.

#### IMPORTANT: THE NEW SENSOR AND SLINGER ARE PRE-ASSEMBLED. DO NOT REMOVE THE SLINGER FROM THE NEW SENSOR PRIOR TO INSTALLATION. IF THE SLINGER IS REMOVED, THE PARTS ARE DAMAGED AND CANNOT BE USED.

1. REMOVE FRONT WHEEL HUB AND BEARING ASSEMBLY FROM VEHICLE AS DESCRIBED IN THE SERVICE MANUAL (SEE ON-VEHICLE SERVICE IN SECTION 3C).

2. CLEAN ALL DIRT AND DEBRIS FROM ENTIRE ASSEMBLY BEFORE REMOVING SENSOR.

3. USING SPLIT PLATE PULLER (KENT-MOORE TOOL J-22912-01 OR EQUIVALENT), REMOVE SENSOR AND SLINGER FROM BEARING ASSEMBLY.

#### IMPORTANT: IF THERE IS EVIDENCE OF WATER BEING PRESENT INSIDE THE BEARING OR SENSOR, REPLACE THE ENTIRE HUB AND BEARING ASSEMBLY.

4. REMOVE OLD SEALANT FROM GROOVE AND SURROUNDING SURFACES ON OUTSIDE DIAMETER OF BEARING HUB.

5. APPLY CONTINUOUS BEAD OF NEW SEALANT (LOCTITE(R) 620 OR EQUIVALENT, SUPPLIED IN PACKAGE) TO GROOVE AROUND OUTSIDE DIAMETER OF BEARING HUB.

6. REMOVE PLASTIC SHIPPING SHIELD FROM CONNECTOR BODY ON NEW SENSOR.

7. REVIEW THE ATTACHED ILLUSTRATION IN ORDER TO ASSURE THAT THE CORRECT SERVICE KIT IS BEING USED. IT IS ALSO IMPORTANT TO ASSURE THAT THE PROPER INSTALLATION TOOLS ARE USED.

A. FOR SERVICE KIT #10457144 (1ST DESIGN) -

INSTALL SENSOR ASSEMBLY (WITH SLINGER) TO HUB AND BEARING ASSEMBLY USING AN ARBOR PRESS AND KENT-MOORE SPECIAL TOOLS J-38764-1 (INSTALLER) AND J-38764-2 (WHEEL STUD PROTECTOR RING) TOGETHER. USE OF THESE TOOLS ASSURES PROPER POSITIONING OF SENSOR AND SLINGER. AFTER INSTALLATION, CAREFULLY EXAMINE SLINGER FACE TO ASSURE THAT IT HAS NOT BEEN DISTORTED OR DAMAGED.

B. FOR SERVICE KIT #10457282 (2ND DESIGN) -

INSTALL SENSOR ASSEMBLY (WITH SLINGER) TO HUB AND BEARING ASSEMBLY USING AN ARBOR PRESS AND KENT-MOORE SPECIAL TOOLS J-38764-4 (INSTALLER) AND J-38764-2 (WHEEL STUD PROTECTOR RING) TOGETHER. USE OF THESE TOOLS ASSURES PROPER POSITIONING OF SENSOR AND SLINGER. AFTER INSTALLATION, CAREFULLY EXAMINE SLINGER FACE TO ASSURE THAT IT HAS NOT BEEN DISTORTED OR DAMAGED.

8. INSTALL HUB AND BEARING ASSEMBLY TO VEHICLE AS DESCRIBED IN THE SERVICE MANUAL.

#### PARTS INFORMATION:

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

FIGURES: 01 ATTACHMENTS: 00

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.

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