Trying to diagnose a new sound/feel, literally gives the impression someone is under the jeep knocking on the floor board & I can feel it through the floor and the pedals. It happens accelerating and slowing, & also when I pop it out of gear & coast. I read some other threads here & checked the control arms, transfer case linkage & shock mounts & they all seem tight. In addition there’s the distinct sound of a nut rolling around on bare metal, it’s very loud & at first I thought I dropped a nut & it was rolling around under my seat but I’ve search high & low & can’t find anything, it sounds like it could even be rolling around inside the frame rail. I did a tc drop months ago & removed it a couple weeks ago in favor of a sye. From what I’ve read the most likely culprit would be the linkage but I pulled on every part of it & it’s solid. I just don’t know what I’m missing?