Got in the car this morning after putting it in the garage problem free last night, and it was sluggish going in reverse. Once I got it on the street in drive, the was a "strange" noise coming from the rear that sounded like a loud rub. It seemed to come once with every rotation of the wheels and got faster as the car went faster. Mind you I noticed and didn't go over 5 mph, then parked it to take my wife's car to work. Anyone have any ideas?Thank you in advance.