So if I understand this right, if jwco5.3 could clone his truck and trailer so everything is identical except the rear ratio on #1 is 3.55 and on #2 clone rig is 4.56, #1 has no trouble keeping up in the hills, because it has the same power?
I guess it could be so if the trailer is so light it never really makes either truck lug down at full power on a grade...
OK - so then a 450hp pickup truck can hook on the same load as a 450hp class 8 Freightliner and drive away with it then, right? Same power. Gearing doesn't matter.