I presently have a 2011 ram 2500 short box . Have h&s tuner with full delete . Get 8 mpg towing , over 18 empty . 68 rfe trans . Have Firestone air bags . Tow a 44' toyhauler , over 16,000 empty , probably over 20,000 loaded . Seems to have plenty of power , trans rarely goes above
185 degrees...