I recently put a 2.5 bb on my jk, and ever since my rear end has been rattling whenever I go over a bump. What could be the cause of this. Im thinking the pig tail isn't seated properly. Any suggestions?

 

that's the first thing I would check. make sure it's seated properly.

what manufacts did you use on your lift. may help to determine if it was a coil lift, spacers lift, etc.

I used JKS spring reatiners on the bottom of my rear springs. they just hold the spring in place/ not isolate though.