This noise on the driver side of the car happens occasionally. Its not constant and i cannot get it to happen on command. when i start it up, and put it in reverse or drive, and start to let off the brakes and turn the wheel it makes a humming noise, you can hear it in the car and outside. Its not causing any problems yet. and my power steering pump is on the passenger side correct? also when i turn the steering wheel all the way left or right, it seems to over extend and the wheels look like they will fall over sideways. There is negative cam wear (inside of tires) and the control arm bushing dont look pretty. and my tie rod ends look bad. but what would cause this? i have a feeling that if im going fast enough and turn, it will buckle the tires.