3.73 gears

Hey all, first time user/poster. I am trying to gather feedback on an issue I've been having with my 2011 3.7 V6. I have had the 1 piece aluminum driveshaft and 3.73 gears installed at the same time by a local speed shop and they even dyno tuned it.(Shameless brag of 300HP at the wheels. Woot!)...