Knocking from rear end

[spacemonkayy]

My 2022 has a knocking sound coming from the rear end, I've drained the rear differential and didn't see anything out od the ordinary. I took it to a mechanic he couldn't find anyrhing he thinks it may be the clutch in the rear differential. I took it to the dealership and theh said it's my leafsprings. It only makes the noise when im turning slow and it seems to be with a full revolution of my driveshaft. Also if I press the breaks and gas it for a burnout it also does it.. ive been riding her a little harder then normal (italian tune up) to see if she will expose the problem.. we are all a little stumped right now.. anyone have any experience with this issue