car with no LSD, left tyre go in mud. then right tyre will not turn/spin, only left tyre will turn as it less load. so ur car will stuck in mud.
car with lsd, left n right tyre oso can turn, so left tyre in mud...right tyre still will turn.
car without lsd power it deliver to either one of the wheel, u jack up ur car n engage gear....u hold left tire n it will stop,but right tire will turn.
car with lsd, 2 tires oso will turn.