I have had the same thing you are describing happen to my car. This happened before I actually bought the car and I noticed this when I took the car for a test drive. I bought the car from a Ford dealership and they agreed to have Chrysler fix it free of charge to me. I cannot remember exactly what they said the problem was but I checked up on the car every couple of days and they had my steering wheel off and the entire dash taken apart. They ended up keeping my car for two weeks before the problem was fixed. All I can remember was that it was a modulator of some sort. Sorry I cannot give any more info than this.