Defect summary
BEARINGS USED IN THE REAR AXLE HUBS ON THESE VEHICLES ARE IMPROPERLY MACHINED; BEARING COULD SEIZE AT LOW MILEAGES BEFORE SUFFICIENT RUN IN IS ACHIEVED.
Consequence
IF THE BEARING SIEZED, THE AXLE HUB WOULD BE NOISY ATBEST, AND IN THE WORST CASE, THE AXLE SHAFT COULD FALL OUT CAUSING LOSS OFVEHICLE CONTROL WHICH MAY RESULT IN AN ACCIDENT.
Remedy
INSTALL NEW REAR WHEEL INNER AND OUTER BEARINGS.
Notes
SYSTEM: REAR AXLE HUBS.VEHICLE DESCRIPTION: HEAVY TRUCKS.NOTE: THIS BEARING CONDITION IS KNOWN TO AFFECT ONLY THE REAR WHEEL AXLEBEARINGS MANUFACTURED BY KOYO. KOYO IS STAMPED ON THE BEARING INNER AND OUTERRINGS FOR IDENTIFICATION.
Source: NHTSA ODI recalls file, campaign 91V015000. Text as published by NHTSA.