Mountain driving and towing with a gas class A

We drove La Veta and Wolf Creek passes with a 275 HP 99 V-10 with no particular problems towing a car on a dolly. Gear down going up and gear down going down. Use the brake as little as possible and gears as much as possible. Transmission will up shift going down hill and you can use the brakes to slow down enough so it will down shift and provide braking.