def get it looked at asap!! My right rear failed while I was going roughly 60mph on the highway @ like 2am. I lost control of the car and spun out, which shut engine car off. I started it back up after i got the car to a stop and I could barely get it to the side of the road. It cost me well over $600 cuz it ruined my caliper, rotor, pads, hub, and of course the bearing. I am also very lucky that it was wicked early in the mornig when it happened cuz i def would have hit another car. But w/ mine I had no warning signs it just went up. So just be careful and make sure you get it looked at. Oh yeah it also pulled the allignment out and messed up the tire, because evidently the wheel just locked so it put a flat spot on the tire. No one ever believes this but it is true........I never thought that just a bearing could cause so much damage either, but it did. And i have the recipts to prove it. Get it looked at.
Patrick