I have the same bumping/thumping noise right behind the driver's seat (Dinette) on my 2014 Challenger DT. Mine seems to move from front to back and comes and goes. I've had it to the dealer multiple time and they can't seem to find the issues. It's definitely something lose and it's moving or rolling. It's extremely loud and annoying, as those of you with the same problem are aware. I hope someone figures it out before the slide out has to be torn apart...
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ROB
2014 THOR CHALLENGER 37DT
Michigan
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