So everyone above is talking about when the window "tilts" when going down I assume. Mine makes a snap/pop sound intermitt. for a split second just when it starts to go down from the closed position. Is that the same thing or something else causing that? I pulled the panel off and my main holding bracket(to the glass) is in tact but I did notice the plastic guide in tact but alot of play in it. I greased everything up, lubed the tracks, and tried it and still does it at will. Any thoughts or experiences? Thanks.