I am a new member to Tdr this is my first thread. I have a 04. 5' 3500, swb, 4 wheel drive, 4:10 gears. I haul a 9' Arctic Fox cabover camper 3500 lbs. dry. My question is, when I am descending a steep mountain grade with the camper I will sometimes put it down in to first gear in towhaul. When...