I had the noise in the rear of my car almost from the beginning and it did gradually get worse. I only heard it when turning 90 degree turns. I did not have shaky steering and the car did not pull. I have noticed that I have to watch my tire pressure. It may be where I live (SE TN) and all the extreme temp. changes that effect my tire pressure more than I was use to (larger tires?). I never had an alignment problem. The rear cluthes were an easy fix. The dealership took one day to get the part (rear clutch pack) and one day to fix it. I would take it by Ford and have them check it out if you are still under warrenty. Good luck.