Actually there is a huge difference between snow and ice.

I wouldn't flinch driving one in snow. My Detroit locked Toyota is fine all winter in 2WD, it is very stable and predictable. There are times you need to take it easy - primarily when starting out from a stop, esp on an incline - but otherwise it just goes, and goes straight.

Ice - forget it. With both rears always spinning, your rear will go sideways instead of forward b/c it will break traction. If you get a bit of ice, I wouldn't suggest welding it - save up for a selectable locker.

4x4Wire's Toyota Section
1995 FZJ80 LandCruiser - 3 locking diffs, +200k mi, JD HIR's, 285/75R16 Nitto TG's
Olde North State Cruisers