Different OEM "tune" on 2013 vs 2011
I recently switched from a 2011 to a 2013, both XLT 4X4 3.7's. I had a Rousch intake, and Resonator bypass on both.
I noticed that the 2013, in addition to many other differences, definitely has less bottom end torque. The throttle is as responsive, but it jumps down a gear or 2 more readily. The sharper transmission response / tune makes the truck feel at least as responsive, but it downshifts more often for sure.
On my previous 2011, I had noticed since the day I bought it, when I got on the throttle, there was a slight, low frequency rattle, which I assumed was light knocking, but never really gave it much more thought. The new truck doesn't seem to do this. It could be that because it's so much quieter, I don't hear it, but it seems to just go for a lower gear, as opposed to loading up the engine as heavily.
Has anyone else noticed this sort of difference between a 2011 and 2013? From what some of the EB owners have been saying, it sounds like the EB may have a slightly milder factory tune now as well?