Has anyone had trouble with the AWD Dodge Caliber's rear wanting to kick out on snowy, slushy roads?

Everytime I'm on snowy roads, doing about 40 mph or less, it seems like when I go down hills, my rear end wants to kick out and it feels like the car is uncontrolable. You really have to go extra slow on snowy roads, like 20 mph so it doesnt' do this. Any one else had this problem? Husband said it might be our tires on it, they are the ones that came on it, but they are larger rims and tires.