OLDSMOBILE AND BUICK CAMPAIGN NO 75-C-7.CHEVROLET CAMPAIGN NO 75-C-08.PONTIAC CAMPAIGN NO 75-C-9.DATES OF MANUFACTURE FOR CHEVROLET, BUICK,OLDSMOBILE AND GMC ARE SEPT THRU NOV 1974.PONTIAC DATES ARE SEPT 1974 THRUJAN 1975.NO STATION WAGONS ARE INVOLVED.POSSIBILITY THAT THE REAR AXLE WASASSEMBLED WITH REAR AXLE SHAFT OUTER BEARING (REAR WHEEL BEARING) WITH THRUSTPLATES THAT WERE NOT HEAT TREATED.IF THE INNER OR OUTER THRUST PLATES OFTHESE BEARINGS ARE NOT HARDENED, THE ROLLERS CAN WEAR THROUGH AND ALLOW THEREAR AXLE SHAFT TO MOVE WITH RESPECT TO AXLE HOUSING.(CORRECT BY INSPECTINGAND REPLACING AXLE ASSEMBLIES WHERE NECESSARY.)
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