Wheel Hub: Testing and Inspection

The hub and bearing is designed for the life of the vehicle and requires no type of periodic maintenance. The following procedure may be used for diagnosing the condition of the hub and bearing.
With the wheel, disc brake rotor or brake drum removed, rotate the hub. Any roughness or resistance to rotation may indicate dirt intrusion or a failed hub bearing. If the bearing exhibits any of these conditions during diagnosis, the hub and bearing will require replacement. The bearing is not serviceable alone.
Damaged bearing seals and the resulting excessive grease loss may also require hub and bearing replacement. Moderate grease weepage from the bearing is considered normal and should not require replacement of the wheel bearing.
To diagnose a bent hub, refer to Brakes and Traction Control for the procedure on measuring hub runout.