I have a Rapping/tapping noise coming from the front of the car that seems to be wheel speed dependent and it is not like metal on metal. I can hear it a little when driving straight, when I steer left it goes away and returns as soon as the car is straight again. When I steer right, it gets much louder. I had the wheels rotated thinking it might have been a tire that was "off" but that did noting to fix the issue. Is this a possible hub assembly? I thought about just replacing the wheel hub to see if it fixes the issue, but don't wanna spend the cash on a hub when it might be something else. Any thoughts?