Anyone know what it is and how to fix it??

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It's probably the axle click issue. There is a Technical Service Bulletin about it. It will be covered under warranty if there is any left on your car.

clean and grease your rear disc brake sliders.

Thanks for the feedback guys! I think it is the axle click issue, but I also hear a different clunking noise when I go over dips and bumps. Does anyone know what the clunking might be? Im taking it in to the dealer soon but im out of warranty. They want $121 to lube up the axles.

the noise from dips and bumps is probably your compression rods. Do a search... there's plenty of discussion and solutions here.

Are you out of the 6 year/70K mile powertrain warranty? If not, the powertrain warranty should apply.