Highway 4WD in snow and ice can be dicey no matter what locker is in the front. On a slick patch, a locked front loses all steering - not a good thing. That's why some prefer selectable lockers so they can be switched on and off as needed.

I haven't yet tried the Aussie Locker in snow, but I suspect it would not allow much steering on ice or hardpack slick snow. For driving any distance in snow on the highway, I would think it would be better to engage only one side in front so there is some differential action and some extra traction.... in effect, 3WD.

Others who live in snow country will know more than I do about how to negotiate the slick stuff with front lockers.

Here in SC, we get a lot of black ice, which is bad no matter what, but is generally negotiated better with open differentials at both ends.... particularly in a SWB. But no matter what differentials, highway snow and ice driving requires some skill, a light foot and sense enough to slow down.

Frank