When I drive my car above 20 miles/hr it start making a loud roaring sound like a gear is not shifting (but it is). Sometime it make a loud squealing sound until I press on breaks hard the squeal goes away but not the roar. I have had problems with the front end since I got the darn car and the dealer (while warrantied) said nothing was wrong. Now the problem has gotten progressively worst. I also know my rotars are warped and it shakes the car sometimes when I stop but the brake pads are still good. Help! Why is it making that roaring/squealing noise?