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NEVER configure your vehicle with better traction on the front that in the rear on ice. Chains go on the back - ideally all four.
It was a hard lesson learned for the owners of front wheel drive cars that came out in the '80s when Colorado mandated studs or chains by law. Folks would stud the front and not the rear, and before they got down the street they were looking at the headlights of the guy behind them. Having better traction in the front than in the rear will cause the vehicle to swap ends in any forward momentum when the rear looses traction and the front does not. This occurs when in a turn on ice, slowing downhill, even just mild braking. You ALWAYS want the rear axles to be the traction axles so in forward momentum it forces the vehicle to remain straight forward in a stop.
Trying to stop a vehicle with chains or studs only on the front is like throwing an anchor over the bow at 60 knots - the effect is the same - hold on!
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