I have a weird rattle noise coming from underneath while accelerating from 2nd to 3rd about 20 to 35mph on a cold start. If I put my shifter in neutral around that speed it still rattles? When I come to a stop there is no rattle and when the jeep warms up it stops? I checked my t case fluids and they were just fine. Looked at my u joints and they were good as well. Anyone else have a annoying rattle like this? It sounds like a bum shaking a coffee can with some change in it. Any help would be appreciated thanks!!!