I purchased a Ram 2500 with the 5.7 Hemi which I no longer own. Not coming on here to "bash" anything or anyone, I just wasn't happy with it and I am NOT a troll, or going to boost another product line, just telling folks reading this like it is with the truck that I owned.
Anyhow, the truck had a couple of fundamental problems that I decided not to live with.
First it had rear end gear "whine". Completely silent on or off the throttle but at very light load at certain speeds it would howl load enough to make you want to grind your teeth. So I found myself pushing on the throttle just a tad to shut it up. It was the loudest around 60-67mph in case anyone is experiencing something similar, pretty quiet at any other vehicle speed.
It had a "surging" issue at moderate throttle, sort of like the ECU was "hunting" for the right fuel/spark/cam timing but not really finding it.
If you slowed down for a yield sign or "rolled" thru a stop sight/light around 5-10mph it would "tie-up" in the transmission, not really knowing exactly which gear to be in or when to shift to low gear to pull the truck back up to speed again. So you'd just push the throttle down, and down, and down some more then finally it would shift all the way to low gear and lunge forward like you were launching it at the drag strip! Pretty annoying so I found myself coming to a complete stop more times than not so it would avoid that scenario.
I took it to the dealer twice for the gear whine, no one involved with looking at it, driving it or trying to fix it heard anything....FWIW.
The final straw that breaks the camels back here was fuel economy. The last half dozen tanks I ran thru it best was 11.7, lowest was 11.3. I know they don't guarantee any mileage for the HD trucks, but come on now, it's 2108 not 1979. This is not my first Dodge, nor is it my first Hemi powered one, and all the previous Dodge trucks I owned had dead quiet differentials at any load/speed and got better fuel economy.........Cliff