Rattles and clunks from rear of vehicle

[lizardnorm]

Have about 10k on my xlt now and in general it's been great. I have this clunking / rattle sound that seems to be coming from underneath the bed, possibly suspension or something. It doesn't make the noises at at highway speed and really only seems to be at parking lot speeds. Little cracks or bumps in pavement are the worst. Seems like something is loose under the truck. I'm lowered on eibach springs since about 2k miles. Checked the suspension last night doesn't seem to be it. No hitch to rattle. Sounds like metal on metal. Thought I saw a post about a loose heat shield and exhaust but can't find it. Anyone else have a simial issue or have other ideas to check? It's super annoying

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[lizardnorm]

Sorry, should have mentioned I checked that too.

 

[fossil]

Since you've modified the suspension the dealer might be reluctant to help.
I'd jack up the rear, both sides at once. Use your stands, chocks and get under there and start shaking thing up. Start with the sway bar ends

 

[lizardnorm]

I'll check out the swaybar. Good tip

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