i have 08.5 gt cwp and while i was at driving real slow in the parking lot to find aparking space their was a humming noise coming from the front portion of the car. The noise sounded like cold wet brakes when first applied in the morning a disappear when they warm up. When i speed up it goes away and when at idle it also makes the noise. I then turned off the car and it went away however when i went onto the freeway and came upon stop and go traffic it became apparent for a minute then went away. Anybody have this problem??? Car runs fine though just wondering what this noise is???