He's kind of full of poo. He claims the reason the Ram didn't want to pull the hill better was because the 6 speed transmission would have caused the Cummins to over rev if it had downshifted from 5th to 4th. The 68 RFE could have dropped to 4th gear no problem... That said, I like the transmission programming just the way it is. I would rather climb the hill at 105 km/hr, be slightly under the cruise control set point, and at 2000 rpm vs downshifting to 4th and accelerating to 2560 rpm to just to maintain 110 km/hr. If having an F150 pass me were to bother me I could always manually select 4th. He says the Cummins has all sorts of low end torque, but, in reality it was the lack of low end torque that prevented him from climbing the hill with the ease that the Powerstroke was able to accomplish the climb with. I think the Powerstroke climbed the hill at 110 km/hr and about 1900 rpm.
