I did a massive leap from an '03 with 3.55 to a '13 with 8 speed and 3.92. For me it was a noticeable difference. The 3.92 is much more responsive. The traction control and horrible shift points at WOT on the 8 speed make it feel like it is handcuffed. Don't get me wrong I find it quite fast and very responsive but I know there is SOOO much more to be unlocked with a good tune, especially a transmission tune.
5.7L/8 Spd/3.92/Air Ride - Whited Out Badges - S&B CAI, 87MM TB, BT Catch Can, Magnaflow 22", Magnaflow Y Pipe, Weathertech Vent Visors, White 3" Stubby Antenna, DeeZee Tailgate Assist, Bak Flip G2