So it snowed here the other day and i was driving the x-fire in Wet/winter with the traction control on. Anytime the tires started slipping it would make an almost crunching/grinding noise. Is this just the traction control on the brakes? Sounds like it is coming from the rear. This may be a newbie question but i just got the car and this noise is a little worrisome. And i know, the car is not the best in the snow...Any help would be appreciated, thanks