I have a 2000 Saturn SL1 4-dr with a bad hum in the driver's side front wheel when turning left. Hum is still there while going straight (not quite as loud) but is not noticeable at all when turning right. I changed the wheel bearing and it came out in pieces. Also put on a new hub and new wheel bearing, yet still have the bad hum...changing the bearing did nothing. While vehicle was on jack stands I ran the car and turned the steering wheel with no noise. Drive axle seems ok (no wiggle, no clunking, etc.). I'm at a loss as to what could be going on-- rotating tires did nothing. Any help would be greatly appreciated. Thanks!