My wife's car (03 Infiniti I35) needs an alignment. I want to take it to Firestone because of their lifetime alignment. The only problem that I am having is that only the front wheels can be aligned the rear is non-adjustable. They still want to charge me for a 4-wheel alignment because they have to "use the rear wheels as a reference for the front". It does not sound right to me. Should I just pay full price for what seems like half the work?