IN case of a rear door rattle, I've found that if you remove (or even turn) any of the bolts that hold the rear "bits" (the "v" or the latch parts) to the door, make sure that you LocTite them before putting them back into place. They will slowly wander and your rattle/squeak will return if not. Also, only remove 1 bolt at a time. You will only make this mistake once -there is a backing plate that will fall down inside of the door or quarter panel if the entire assembly is removed at once.