We are very impressed with the overall capabilities of our 2007 Ford Expedition we call Aspen. We have 4:56 Nitro gears along with ARB air lockers installed front and rear. This combination is incredible. So far we have not got the truck stuck and rolls over the toughest terrain with ease and more importantly comfort. Watch Kande lift the driver side wheel over 12 inches in the air. She had a ball driving. She only has the rear air locker engaged and the transfer case in low range.