Ford/Chevy mileage
So I like the mileage our 2012 D/A gets with and without towing. We are looking at the Ford F350 with 3.55 rear end and wondering if the mileage is comparable or not.
Forum Discussion
Lynnmor wrote:
A Ford 6.7 has two different gear ratios available. With 18" wheels you get 3.31 and with 20" wheels you get 3.55. Both setups turn the engine at the same speed and no difference in mileage can be expected.
There is one exception, with the snow plow prep package you can get the 18" wheels and 3.55 gears. This is the best for pulling power and the front suspension will be the same on a F250 as a F350.
What you are saying is not true. I don't understand all of the difference between 3.55 and 3.31 gearing but it won't surprise me if the trucks are set up with different software for the injection cycles. the owners manual even gives an estimate for how far the truck will travel on a tank of def. They state something like 20% further range on the 3.31 ratio trucks.
