F150 3.15 axle 10 speed equals 3.55 axle 6 speed

time2roll wrote:
Anyone have a 2017 EPA number for 3.15 vs 3.55?
I cannot seem to find much where is ratio is called out.

I believe this is a comparison of the 3.15 (standard) vs. 3.15 with LT tire vs. 3.73 (HDPP).
City: 18 18 17
Hwy: 25 23 22
Combined: 21 20 19
I expect that the 3.55 would be between the 3.15 and the 3.73.

Note the 14% increase in hwy mpg, 22 vs 25, 3.73 vs 3.15.