VEHICLE DESCRIPTION: TRANSIT COACHES. THE TRAILING ARM SHAFT ON THE REAR AXLE COULD SHEAR OFF AT A LOCATION BETWEEN THE INSIDE BEARING AND THE AXLE TUBE. THIS DEFECT DOES NOT ARISE UNTIL THE MILEAGE ON THE SUBJECT VEHICLE IS IN EXCESS OF 60,000 MILES. IN ADDITION, THE DEFECT APPEARS TO ARISE ONLY IN THE EVENT THAT THE DRIVER OF THE VEHICLE HITS A CURB OR OTHER OBJECT WITH THE REAR PASSENGER SIDE WHEEL. WHEN THE DEFECT OCCURS, THE TRAILING ARM AND THE MECHANISMS ATTACHED TO IT, INCLUDING BUT NOT LIMITED TO THE WHEEL, LODGE UPWARD INTO THE WHEEL WELL OF THE VEHICLE AND STOP THE ROTATION OF THE TIRE.