Sounds like a race car

Mine is a 94 Regal, and when driving my car, the car sounds almost like a race car: very loud and when I come to stop sign, it sounds like a car that has stick shift when its winding down to go into another gear. My car is not stick either. This has never happened before. I checked to make sure i had a muffler, but the noise is kinda unbearable. Any clue?

As I found out it was the bearings and roters (sp?)...We'll see how much this costs me! Yikes!