I have a 2010 Canyon 5.3L 4wd with 410 differential, so the mileage leaves a lot to be desired. I don't street race it or take it to the woods to pull stumps very often, so would like to find a way to improve the MPG. Does anyone have experience with replacing the front and rear ring and pinion to something in the 308 or 373 range. I would like to go to 308 unless somebody yells NO WAY! Thanks!