Difference between 4.30 & 3.55 gears
My 2011 F-350 has a 3.55 geared rear end. The new 2017 F-450 only comes with a 4.30 geared rear end. Basically the same engine (6.7 turbo diesel). Does that mean better or worse fuel consumption...
Forum Discussion
SoCalDesertRider wrote:
Most of the factory stock tire sizes for American 3/4-ton and 1-ton pickups are within about 2 inches diameter of each other, regardless of the factory wheel size.
When you take the pi factor into consideration, a 2 inch difference in diameter is about a 6.4 inch difference in circumference.....and that's quite a bit.
