When one wheel slips on the ice it locks up the auto locker, then causing both rear wheels to slip on the ice. I have an aussie in my 97 and like it quite a bit. It is nearly unoticeable on road and very nice off road. My previous two 80s were triple locked, and I liked that better, but for long term durability and ease of repair, the aussie wins out.
For rusty's question--I would not drive a double autolocked anything on road in 4wd, especially not on ice, loose snow, yes, but that is about it.(unless the front was a truetrac type LSD)
In your situation, the 80 rear axle would still lock up and slip, but the front axle would be pulling you through the turn. As long as you aren't on the throttle hard, as soon as the front starts to pull, the rear will unlock. If you stay on the throttle, the rears will push the fronts into severe understeer and you will go straight instead of turning.
For rusty's question--I would not drive a double autolocked anything on road in 4wd, especially not on ice, loose snow, yes, but that is about it.(unless the front was a truetrac type LSD)
In your situation, the 80 rear axle would still lock up and slip, but the front axle would be pulling you through the turn. As long as you aren't on the throttle hard, as soon as the front starts to pull, the rear will unlock. If you stay on the throttle, the rears will push the fronts into severe understeer and you will go straight instead of turning.