I've noticed the rattle as well, but I haven't worried about it. Once I get my truck fully loaded for a trip I never notice it, only when I'm driving aroun town with only the fridge in back do I hear it.Sorry if already covered before but I was curious if it was normal to get a little dull rattle from what I think is the compressor when driving. (When it is running, its virtually silent). I always thought it was normal, but just started wondering if mine was loose or something.
Used it 5 times now for camping trips into hot enviornments and it is so far one of my most favorite investments for under $500! If it lasts a few years, I'd be even more stoked.