The -10 TM says "Operating on snow or ice requires use of tire chains on forward-rear axle tires. Refer to FM 21-305 for installation of tire chains." and goes on to say "NOTE Use tire chains on forward-rear-axle-tires. For M939 series vehicles place chains on outside tires." I usually use two sets. One set on the fronts and one on the center axle. However, if I'm in heavy, deep snow, I find it hops too much and will chain up both rears. It helps a lot. For snow, I find THE biggest assist is having weight in the back (cargo). The TM says no chains in sand. ??
Al Jones
M923