[wingnut60]

Terry,
Your 450 should do just fine towing in the mountains. One thing I have noticed on my '09--when climbing long grades and it comes time to downshift, I have to make it shift by pulling the lever into 3. I cannot make it downshift by putting the pedal to the floor, and when doing it this way, I think it skips 4 or Drive and drops from OD to 3. Not sure about this sequence, but the truck won't do it by itself until it has lost way too much speed. Might keep this in mind when you start climbing passes up there. I intend to take this up with Ford, but itsn't a priority for me til I go to UT in June or CO in July. Several others on some Ford forums have mentioned this quirk.
Joe