I understand your situation as I also have a 2001 3.0 that seems to act weird when the wheel isn't dead center. However, this has never really bothered me but I do notice it. On the other hand, when I have the wheel dead center, and on a straight level highway, I can release the wheel and it will track straight as an arrow. So go figure...guess it's just a quirk. But don't think you're alone, because I completely understand your situation. Hope this makes you feel a little better.