Just the loud noise is bad enough but it nearly always shakes the rig - often it shakes a lot. It is more prevalent in front and seems to be temperature related, but it can happen many times though the night - frightens us awake. I put in at least three quarts of antistiction fluid (both torco and cat) over several years, and it helped a little for awhile the first time; but the problem came back with a vengence. Last winter my left front jack started leaking for 3-4 months, but it stopped leaking and now is dry. It seemed to pop just as much when leaking. I suspect the frame has something to do with it as well. Bob Tiedge from Lippert came to our camp site several years ago to help, and we greatly appreciated his effort, but he's only one person and very busy.
Its getting time to consider a new rig, but we won't consider anything with a Lippert frame or Level Up. Our rig popped since new and Lippert hasn't offered much help. We won't make that mistake again.