Mine kinda does that, too, but only when it's cold. I noticed it started doing it after I managed to break a couple of the plastic clips when I pulled it off to feed CB coax cable, tweak my aftermarket tire carrier, etc, so it's on me.Anyone else have the black plastic that is on the inside of the tailgate rattle when driving? I’m 100% sure it’s the plastic because it stops when you sit back there and push on it. It is so loud though and I’m looking for a fix besides tape…