Well for one thing, the center diff isn't designed to hold any oil so im not surprised it leaked. Second, if you could get oil to stay in the tray, your just going to induce a higher load on the motor, thus on your ESC and thus on your batteries and and the tranny isn't designed to split loads, so whats the point of this? Throw some heavy grease on the gears if your worried about friction and call it good. The flux IS NOT a truggy, why the hell do people keep modifying and expecting monster trucks to be something there not designed to be?