I am considering lifting the rear of my burban about an inch and the cranking the tbars to level it. Changed the oil this weekend and while I was under there, I looked to see how much cranking I could do. I discovered that the drivers side is cranked more than the passenger side, although when I measure from the top of the tire to the bottom of the wheel well, it is the same from left to right. Are my keys worn? Should I just consider getting re-indexed keys? Thoughts?