What Truck, there are big differences in the 2013+ between the 2500-3500, the 2010-12 the only difference from 2500-3500 was springs and brakes.
A lot of owners in 2013 2500 got the shaft BC the only change was engine, the 3500 in 2013 got all the new FRAME,DL,ENGINE,STEERING,TRANS. The 2014 2500 received a new Frame and rear air with the new Steering. There are many changes that have taken place in the Ram truck line, Most have NO idea what they are buying.