Ok, so I know about the tricks to get the truck leveled front to back, but after installing a 4" spring lift, the rear drivers side seems to be sitting 1 inch lower than the rest of the truck. (and not when I'm in it) I can't see anything obvious that's bent. The tires have different amounts of tread, but the low corner has the most amount of tread and a different tire brand. The axles are level, but somehow the springs are not. TC 4" springs up front and TC 2" with ORD shakle flip in rear. Does anyone have any ideas what that might be about?