So my truck has been pulling to the left since before I got new tires. Both of my front tires were cupped on the inboard side - the right more severe than the left. I was told this could be caused by lack of rotating the tires (guilty). So last week I got four new Firestone Destination LE's and the truck pulls even harder to the left. When going down the interstate, if I am in the right lane and let go of the wheel I am in the left lane in 7 seconds.
According to my understand of toe (see photo of my handwriting below), they made the alignment come into spec by changing the toe to the left, which would make it drift left even more than before. Does this mean something else on my truck is messed up? Here is a list of the suspension work that was done before I bought the truck at 120,000 miles.
85,000 right front upper ball joint replaced
92,000 front stabilizer links replaced
93,000 right front wheel bearing replaced
102,000 both front lower ball joints replaced
145,000 current mileage - new tires & alignment