A steering knuckle contains your wheel hub, which the brakes, wheels and suspension all attach to. If you have had any accident or contact with you wheels make sure you carefully inspect the hub or better yet replace them with new ones from Pelican Parts. A bent, crack or over stressed hub is not something you want on your car.
Steering coupling assemblies help connect your steering shaft and components. They are also used to eliminate vibrations from the steering system. If the road is feeling a little bumpier you may need new ones.
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