For the guys that fixed the problem, did it come back? I have the same problem and did a whole bunch of things to get rid of it. Swapped springs from side to side, new MM isos top and bottom, lubed here and there tightened everything and more. I have H&R sport springs, new bilstein shocks, the isos and BF diff brace. I eventually got rid of the sound when I did everything I mentioned but a few weeks later after a short burnout the sound came back. Idk it's weird, I thought I was done with the sound but it's still here. For you guys that fixed the problem, have you done a burnout lately? Not a major one, just one that will shake the rear end a little and settle things. Did it come back? If you haven't, and you don't mind trying, would you? It's hard to get to the bottom of the problem. I'm sure it's something the we can all do but it jus hasn't been found yet. It would help if I could get the car on a drive on lift and just look at things under there.