Its lil hard to explain I have a manual trans 13 unlimited when I'm in heavy sand or going up a steep rocky hill while in 4 hi and traction is off I floor the pedal jeep feels like it's fighting to move forward something is holding me back feels like as if your pulling 10K trailer behind you,few seconds later I get this smoke coming from under the jeep and a burning smell smells like the clutch maybe?? Anyone have any ideas??