Ethos

I bought a rescue truck that I am converting to an RV. Firetruck chassis with ambulance rear. Being a firetruck chassis, the engine extends over the front axle a bit. Traction on icy conditions is very poor. Tires are in good condition. Steer axle weight is 11,500. Drive axle weight is 7060. Gvwr is 26000 lbs. Will adding some weight to the rear make much of a difference? I'm new to RVing and new to medium duty trucks. All advice is welcome.