* Wobble or shake in the steering wheel, especially at higher speeds: This is a classic sign of a failing wheel bearing within the hub assembly.
* Unusual noises: Grinding, humming, clicking, or roaring sounds coming from the wheel area, particularly when turning or braking, strongly suggest bearing wear.
* Excessive play in the wheel: If you can grab the wheel and feel significant movement (more than a tiny amount of play is expected), the wheel bearings are likely worn.
* Uneven tire wear: While not always directly caused by the hub assembly, premature or uneven tire wear *can* be a symptom of a problem with the wheel alignment, which might be related to a worn hub.
* ABS or traction control light illuminated: A faulty wheel speed sensor, which is part of the hub assembly, can trigger these warning lights.
* Leaking grease or oil: This indicates a seal failure within the hub assembly.
Important Considerations:
* Ignoring these problems is dangerous. A completely failed hub assembly can cause a wheel to lock up or detach while driving, leading to an accident.
* Professional inspection is recommended. A mechanic can accurately diagnose the issue and determine if the entire hub assembly needs replacement, or if a less expensive repair (like just replacing a bearing) is possible. Trying to diagnose this yourself without experience can lead to improper repairs or missed issues.
* Hub assemblies are generally replaced as a unit, even if only one component within is faulty, due to the complexity of the assembly and the risk of premature failure if only part of it is replaced.
In short, don't wait until your Cavalier is making a loud grinding noise and the wheel is wobbling violently. Regular inspections and attention to any unusual sounds or vibrations will help prevent a catastrophic failure.
