Rear end rattle

Temps are way off. The two minis are:
If these are way off I might have not hit the correct spot. Tell me if you think so

Left top 660
Left bottom 570
Right top 660
Right bottom 500
Main cat front 350
Main cat back 250
 
Got a frame mount receiver hitch? My tail pipe clangs on that at odd times.

I do, the hitch isn’t attached. I have banged everything underneath with a rubber mallet. I think it might be the cat. I think the honeycomb broke apart and is rattling around. I’m taking it this week to have someone else take a look.

I’m completely perplexed.
 
I usually find clunks and rattles by standing on the bumper and bouncing the vehicle at each corner, or pushing very hard side to side on the roll bar. Always found loose or worn suspension parts. Make sure the parking brake is off when checking because it seems to cause its own squeak 🤷🏻‍♂️
 
Oh, so there cat has a rattle but there is something else making noise too?

I haven’t 100% confirmed that the cat is making the rattle. I have smacked everything with a rubber hammer, pulled, pushed, bounced on the bumper, etc. you name it, I’ve done it.

I haven’t been able to really smack the cat good because the skid plate is in the way and haven’t dropped it yet.
 
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