 Purchased a 2011 F-250 with the new 6.2V8, and 3.73 gears (has a 5th wheel towing capacity of 12,000 lbs). Truck was awesome until I pinned onto my 5th wheel! The vehicle is way underpowered to handle a 10,000 lb trailer. It would shift constantly between 5th and 2nd speed to maintain highway speeds (40 to 55 mph) reaching 5000 rpm at times. Dealer tried the truck himself, and could not believe the lack of torque & HP. He was most helpful by taking the truck back, and ordering a new one with the 4.30 gears. I am hoping it will pull, but am afraid it will be thirsty!