I just bought my jeep about 3 weeks ago and since I have had it, it has this randomly occurring clunking sound (not a metallic sound) underneath when I hit a bump in the road or take a slow sweeping turn. The sound also has a "swinging" feel to it. Imagine a rubber mallet hanging from a rope and its attached to the underside of your jeep and swinging around. That's what it sounds like. The sound doesn't happen all the time, just sometimes and it doesn't matter if i'm turning or giving it power. It will even do it while the jeep is in neutral coasting down the road. I can't feel the clunk through the floor nor through anything mechanical. When the sound happens, nothing changes with the way the jeep rides, handles or drives. I have checked under the jeep for loose parts and everything seems tight. I have no clue what could be causing this sound. Any ideas?