ok, my 330 doesnt have posi, im not happy about it , but i dont have 3 grand right now, so............i had posi in my firebird, both tires lay rubber , nuff said, with the open in this car, i drive with dsc off unless its raining, now, which tire lays rubber? if im making a turn is it always the inside tire? or is it the one that breaks free first? will one tire wear out b4 the other? how exactly does it work?