So I own a 2014 Reg Cab and my buddy owns a 2016 Reg Cab.....only difference between the two trucks is the 2 years that separates them and the rear gears; mine has 3.21's, his has 3.92's His truck is noticeably more responsive! faster! Even the engine revs quicker.......WTF? Besides the gear differences did RAM change their calibration from 2014 to 2016? Any ideas?