I need help. Had brakes replaced a month ago, turned rotors. About three weeks ago replaced some power steering hoses. All is good. Starting two weeks ago, i noticed a sound coming from underneath. I would be on the highway, warmed up, and slow down for rush hour traffic - crawling along, and I would hear a woo-woo-woo-woo sound, it would pick up speed as I would then go away. It has gotten more and more constant. Doesn't seem to be brakes sticking. Sometimes it can be felt through the floor boards in drivers and passengers seat. Thanks for any help.