OK I have done my alignment several times in the driveway and keep getting the same results. I get the toe in to a little over a 1/16" and then drive it for about 1000 miles and it starts pulling to the right badly. I can go out and check it now and it seems to be still within spec. It has done this since I have bought it (I have only put about 4000 miles on it) but rotating tires front to rear always clears the issue for a while. Any thoughts on what the cause might be?