I had a F250 Ford with 7.3 engine (I ordered it with the same axle as an F350) and pulled a trailer that weighed close to 14000 loaded (I can't remeber the exact weights but was a little more than the door sticker but neither axle was over weight) and never had any trouble pulling or stopping even in the Rocky Mountains. That 7.3 engine is about bullet proof. I made the mistake of trading for a 6.0 and didn't pull nearly as well. I now have a 2008 6.4 F350 DRW and pull a 15000lb trailer with a combined gross wt. of about 23400 and my owners manual says that the combined gross wt. is 23500 It makes a good combination.
