Yup, after installing the X-chocks it's a good idea to check them periodically. It seems when you first install them and you've just finished a long drive the air in the tires will cool and shrink causing the X-chock to loosen. I learned about this camping near Yosemite on a sloped site, and even with X-chocks the wife freaked cuz she thought the rig was moving. I went outside to check the X-chocks and they were BOTH loose, one of them like it wasn't even installed. WHEW. I tightened back down real good and reported back, "everything is good, it must have been your imagination" and she's never worried about it again and I now check and recheck. I also use triangle chocks at the tires it we are on any kind of front to back slope, for just in case. too. Ir would have been a long way down that small hill and I couldn't imagine THAT story.
In our rig, the floor squeaks, I don't hear any nose outside. In other topics others have had some suggestions but the noise doesn't bother us so we haven't done anything. If the outside jacks, chocks and suspension squeaked, I'd be much more concerned.
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