3:31 or 3:55
Probably going to buy 2013 F150 Crew Cab 4x4 w Ecoboost. Dealership has 2 that are priced about the same, but the one with more options only has 3:31 axle ratio......Other one with less options has 3...
Forum Discussion
Jguetch wrote:
Anyone see a big difference between the ratios?
Either truck with a 9000+ tow rating will do the job for a 6500-7500 lb trailer. Get the one you like best.
Doing the math on tranny gear ratios vs 3.31 and 3.55 drive axle ratios shows about 200-220 rpm difference through 3rd and 4th and 5th at 60 mph. The tranny shows to be the 6R80E that doesn't have a 1:1 direct drive gear but splits on both sides. Makes the 3.31 gears similar to the old trannies and a 3.90 gears all depending on transmission gear selection.
