Hey Snobdds, I know you live in some pretty harsh snow conditions and probably know driving in snow better than most. Perhaps you can shed some light on this.
Most people out there are advocating using chains on all 4 tires. My understanding is that chains on one axle would make the vehicle act like a 2wd vehicle because it now had much less traction on the non chained tire.
• Snow chains mounted on all 4 with 4WD/AWD - ideal lateral stability, perfect acceleration, crisp steering, super braking. However, part time systems will show some understeer (turns are wider than intended). Full time 4WD systems are best. This is what everyone should have for snow and ice. Be careful anyway.
• Snow chains mounted on rear axle with 4WD/AWD - good acceleration, lousy steering (no lateral guidance), marginal braking (remember, 80% of brake force is created at front wheels and without chains that ain't happening). No fishtailing. Best compromise for 4WD with only one pair of chains. Go slow.
http://www.rubicon-trail.com/ML320/ml_chains.html
"Traction is needed for acceleration and negative acceleration (braking). And of course for steering. If the ground does not provide enough traction, snow tire chains are recommended to increase traction - however, if you use a set of chains only on one axle you are essentially re-converting your 4WD/AWD into a 2WD vehicle - a 4 brake vehicle into a 2 brake vehicle. Would you buy a car that has only two brakes?????
Also: For maximum braking and shortest stopping distances snow tire chains are mandatory on all four wheels. With a snow tire chain set on only one axle the stopping distance would be twice as long. Imagine the Range Rover (top image) with chains only on the tires of one axle.
Why spend a premium to own a modern AWD or 4WD SUV to have the safety of a sophisticated 4WD/AWD system and then save $200 for a second pair of snow chains and throw the advantages of 4WD/AWD out of the window?"