I have a 2007 Dodge Ram 1500 mega cab with heavy duty suspension (8 lug able instead of regular five). I've been told it's almost the same as a 2500. My question is, I tow my camper weighing in around
10,000 lbs. I have no problems but do I
need to have overdrive off when towing on
open highways and flat land? It kills my
mileage with it off.