Over the last couple of weeks, my Escape has developed a nasty creak in the front end when I turn. The colder it is the worse it is. Last week was warm and I didn't hear it much. Since it's been really cold this week, it now sounds like the worst squeaky door you've ever heard. Until this week, it was only when I turned left. Now I'm hearing it when turning right as well (but it's not as bad). I will also hear it when I go over the occasional bump in the street. I don't think it's the steering rack. It sounds more like it's part of the suspension... any ideas?