I was wondering if someone could shine some new light on what may be wrong with my 99 Grand Am.
I just got back from a long road trip and about half way back I heard this loud noise coming from under the driver side floor. It sounds as though there is a small engine airplane under my car. At first I thought it was my exhaust, but I couldn't find anything wrong there. When the car is idleing, I can't hear it. I can only hear the noise at 15 mph or faster. It sounds as though something is grinding. Once I hit 15 mph the noise is constant doesn't get louder or softer when I stay on the gas. When I let off the gas is becomes like a winding sound that gets slower and slower until I hit the gas again. Then it's constant again. When I turn either way the noise stays the same doesn't get worse, doesn't get better. Also, I can feel a slight vibration on the floorboard on the driverside that isn't usual car vibration. I took my car to a dealer to get an idea of what the problem may be. They said that the hubs and bearings on both sides are bad, but they said the left hub and bearing were worse and that is what was making the noise. So, to save money I decided to change the left hub and bearing myself. I did, but the grinding noise is still there. I can't figure out what it could be. Please help.
Thanks
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