On some of the involved vehicles, the barrel area between the inner and outer bearings of the hubs could develop cracks. Eventually the hubs could fail.
The remedy
A new hub and drum assembly will be installed by dealer at no charge to owner.
Vehicle description: heavy trucks equipped with aluminum front hubs.system: suspension; front axle, aluminum hubs.consequences of defect: one or more of the following could occur: 1) brakescould lock causing loss of vehicle control, 2) heat could build up betweenbrake lining and drum causing line to blow out or ignite and/or 3) hub couldseparate causing the wheel and tire to separate from vehicle. An accident couldoccur in each case.note: wheel wobbling or thumping IS a warning sign of impending hub separation.