I'm working for a couple days so I won't be able to take pictures for a bit. I just seem to remember reading some time back that the first step for new control arms were front lowers and rear uppers to correct pinion angle and wheel well clearance issues. Can't remember for sure, maybe it was rear lowers? So why do people replace any rear control arms if not for pinion or clearance issues? Does it need to be all four or uppers or lowers?