The engine and transmission can handle the climb with no problem. The newer Ford gas coaches have plenty of power and more than some DP's. Don't worry about it even if you have one with a 24,000 GVW. The brakes can also handle the decent just fine if you use common sense and don't ride them on the way down. Slow down and let your transmission supply most of the braking. Supplemental braking in the toad will help if you need to stop but for it to activate, you have to apply the coach brakes, which you want to avoid as much as possible while descending.
