I have a 2013 F350 Dually with the 6.2 gas engine and 6 speed trans and 4.30 gears. What an awesome combination. Traded a 2006 F250 6.0 Diesel for this truck with no regrets. I use both of these trucks to pull a 34' gooseneck horse trailer with living quarters which weighs about 14,000 pounds loaded per the scales. The gas engine pulls it just as well at the 6.0 diesel did and averages 8 mpg driving the speed limit on interstates. As noted above, make sure the pin weight doesn't exceed the factory spec limit - the weight should not be a problem for the engine or the trans though. Enjoy.