Just today this noise has gotten extremely loud. The noise is a rubbing mettalic sound with the rotation of the wheels. The slower you go the less it happens, the faster you go the more frequent. It gets louder when I turn left or right and seems to be coming from both wheels. If I speed up the sound goes away, but returns when I let off the accelerator. Applying the brakes the sound doesn't go away or get louder so I don't think its those. Any ideas?