I compared the specs for my 2014 FiST with a new 2017 using the VINs on the Ford ETIS website. And I could not find any differences in gears, axle ratios, etc. However, elsewhere, I did find that Ford's manuafacturer's suggested performance data changed. Highway MPGs went from 35 mpg(2014/15) to 33 mpg(2016/17) while 0-60 times went from 6.5 sec.(2014/15) to 5.9 sec.(2016/17). Does anyone know the reason(s) for the changes? Equipment, programming, etc.