Matt .. the 6sp manual for most all 2500 and 3500 should be a G56 it's a all aluminum case unit some 4500 and 3500 can have a unit with a cast iron case,, has to do with how the trucks are ordered by the dealer either unit is a good trans. All make's after 07 when they were required to have the exhaust filter lost fuel mileage like that,, if your getting 15-16 consider your self lucky.. So far the new ford 6.7 owners are reporting mileage back up around 20-22 for the F250/350 4X4 on the highway running empty and 15-17 loaded but this is just what i've been told i haven't checked one myself.. I did a trans service on a new F250 4X4 last month had a 30' empty cattle trailer behind it and when i was test driving it after the service, if you stomped on it any where under 40 mph it would break traction and spin the rear tires, I was impressed Ive only worked on 6-8 of them for minor stuff have yet to see the inside of one for a failure..DW
Im one of the lucky ones I guess. I get 16-17 mpg with my Dodge truck. It has the 6.7 L. I just had to have the turbo replaced at 77,000 miles. I would have been out of pocket almost $4k if not for the warranty. Whats up with that?
I will say this about any of them. You better stay on top of the maintenance with them or they will leave you on the side of the road in a hurry!
dangerzone, you sir are a valuable resource on this board! Thanks for sharing! I will apologize now for all the questions I will have for you in the future!
