Somewhere beneith the seat or even further back, there is a deep rattle, Something is loose. I have looked above the gas tank, check the tire carrier , removed the wheels and brakes and callipers, tightened up the super 88 flanges. checked all the control arms, track bar. 1checked the 1.25 body lift, made sure my back seat it latchet tight. and I can not find the rattle. Like I said its a deep rattle kinda like a pool ball. I do have a OX locker , so the only other thing I can think of doing is removing the Diff cover and making sure the bearing caps are tight and the ox locker and gears are looking good. Everything is working perfectly . The pinion nut has not moved and the U-joints are tight. It has not been too long ago that I checked the transmission mount and it was good, Sometimes the transfer case makes some strange noises, but the rattle is no where close to the transfer can that I can tell. Thinking about ratchet strapping myself under the jeep while someone drives it down a bumpy road. anyway ill start again tomorrow looking for whats wrong. any help? oh yeah, ive checked the entire exhaust and the heat shields above it.