INFO. ON C/C SURGE CAUSED BY LOOSE RELUCTOR RING ON FINAL. Buick Park Avenue 1997

THIS IS A MONTHLY SERVICE NEWSLETTER ARTICLE. THIS BULLETIN IS NOT INTENDED FOR PUBLICATION.

SUBJECT: INFORMATION ON C/C SURGE CAUSED BY LOOSE RELUCTOR RING ON FINAL DRIVE

MODELS: ALL 1991-98 BUICKS WITH 4T60E TRANSAXLE

IF A VEHICLE WITH CRUISE CONTROL HAS A SURGE CONDITION ONLY WHEN THE CRUISE IS SET AND ALL OTHER PARAMETERS ARE NORMAL, CHECK THE TIGHTNESS OF THE RELUCTOR RING TO THE FINAL DRIVE. THIS SHOULD BE A PRESS FIT. IF THE RELUCTOR RING IS LOOSE IT CAN SPIN, ALLOWING SLIPPING OF THE RELUCTOR RING CAUSING THE SURGE. WITH THE VEHICLE HOT, REMOVE THE VEHICLE SPEED SENSOR FROM THE TRANSMISSION CASE AND --CAREFULLY-- PRY ON THE RELUCTOR RING TO TRY TO MOVE IT. IF THE RING MOVES, IT WILL HAVE TO BE REPLACED USING CURRENT SERVICE INFORMATION.

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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.