I have a Volvo XC70. The transfer case broke and the AWD vehicle became FWD and it went from being pretty good in slippery conditions to awful. I couldn't get up hills on streets etc. same snow tires before and after the tcase broke. Maybe just that vehicle has more weight on the rear tires but the front tires sure couldn't pull that car up the hill to get me home if it was a slippery day.