THE YOKE OF THE TRANSMISSION PROPELLER SHAFT MAY LACK REQUIRED STRENGTH DUE TO ERRONEOUS COUNTERBORE OPERATION IN WHICH 10 MILLIMETERS OF EXTRA MATERIAL MAY HAVE BEEN CUT. THIS CONDITION COULD LEAD TO FRACTURE OF THE YOKE IN SERVICE.
ALL AFFECTED PARTS WILL BE INSPECTED AND REPLACED, IF NECESSARY.
VEHICLE DESCRIPTION: TRUCKS.SYSTEM: POWER TRAIN; TRANSMISSION PROPELLER SHAFT YOKE.CONSEQUENCES OF DEFECT: DURING ENGINE OPERATION AT HEAVY THROTTLE, AS INVEHCILE STARTING, FRAGMENTS OF A FRACTURED YOKE COULD BE PROPELLED OUTWARD ANDCAUSE INJURY TO NEARBY PERSONS.NOTE: THE FRACTURE COULD ALSO OCCUR WITHOUT WARNING DURING NORMAL HIGHWAYOPERATION, RESULTING IN LOSS OF POWER AT THE DRIVING WHEELS, DIFFICULTY INMAINTAINING VEHICLE CONTROL, AND A POSSIBLE ACCIDENT.