... ball joint bearing Ball joints are the pivot between the wheels and the suspension of an automobile. Ball joints ... design.Sealed ball joints do not require lubrication as they are "lubed for life" but standard ball ... can be put on a sealed ball joint, they can fail as early as 80,000 miles. ... be at an unintended angle, the vehicle will come to an abrupt halt damaging the tires. Also, during failure, ...