I just traded my 12 hemi 2500 in for a new 18 cummins 2500. Really wish I would have bought the cummins 2 years ago when I got the Hemi. Hemi is okay for towing. I ran a superchips tuner, pedal commander but unless you were running 55-60 towing the trans was always shifting even with the tow haul button on. The Cummins on the other hand, never shifts up or down. I run in 5th gear unless I'm running 80 or more and it works great. And the fuel mileage is very close to double what the hemi was getting. I'm getting right around 18 mpg with just under 10k behind the Cummins. Cummins has a 3.42 ratio and the Hemi had 3.73. The hemi would have been much better with a 4.10.
With HP Tuners you could of taken care of that anyoning shifting....at least now,back when you bought the truck no, ...and I agree the 4.10s would be better with the 5.7s and the 6 speed trans
