Surprising discovery: 5-speed vs 6-speed automatic

Interesting. I know that is not the case with my GMs 1500's, as all the gear ratios are reworked. But that is going from a 4 spd to a 6 spd.

It should help with your unloaded mpg quite a bit, though. My 6 spd '10 gets about 3 mpg better than my '05 did on the freeway (20-21 mpg vs. 17-18 mpg in the old one).