NOTE: 1976 TO 1989 TRUCKS.THE STEERING ARMS USED IN CERTAIN ROCKWELL FRONT AXLE ASSEMBLIES MAY DEVELOP CRACKS AND EVENTUALLY FRACTURE RESULTING IN LOSS OF STEERING CONTROL AND A POSSIBLE CRASH. THIS CONDITION MAY OCCUR WITH VEHICLES INVOLVED IN FIRE SERVICE.CORRECTION: FREIGHTLINER WILL RECOMMEND BY LETTER THAT OWNERS REPLACE THE STEERING ARM AFTER TEN YEAR INTERVALS OF SERVICE IF THEY ARE INVOLVED IN A FIRE SERVICE VOCATION.