Rattle, tinning sound in new 2016 JKU HELP

I am hearing a rattle, tinning sound when i gradually accelerate from a stop. I cannot locate where the issue is at except that I think it sounds like it's coming from the passenger area under the floor. I took it to the dealer, they said it was the splash shield rattling and I took the splash shield off and it's still making the noise! I never run the AC either... Any help from my fellow jeepers would be amazing I literally have 1000 miles on my jeep and it's making this noise and it's an automatic stock not lifted sport
Thanks guys help me please
Sean
 
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