I'm having a problem with ice around here in parking spots. I've had a couple instances where one tire would be on ice, and the other on dry pavement, but when I try to get out, the one on ice just spins and the other sits there. Isn't this part of the reason for a posi rear? When I do burnouts, I can leave two strips, and I just tried earlier to make the the posi wasn't smoked. Also, the car only has 69k miles on it, so I can't see the posi being bad. The only reason I can think of for it doing this on ice, is that there's so little resistance, that the posi is slipping, and letting one wheel spin more then the other, such as when turning. If this is the case though, how come the other wheel does absolutely nothing? Shouldn't it push at least a little bit? Please help.