Took the plunge - Cummins to Hemi 6.4

blderman wrote:
Have you guys watched the Ike Towing Test posted this weekend? I have no idea how credible the testing guys are but I was pretty disappointed in the results. It's making me second guess the 6.4 now. The F150 Ecoboost towing just 1,800lbs less made it up the hill 4 minutes faster than the Ram. It appears the 2nd gear ratio on the 6.4 is really a poor fit for the engine. Thoughts?

You have to read the comment they posted a couple hours ago. They contacted RAM about the results, and got this response:

"We spoke with Ram and here's what they said about the slower Results of this Ike Gauntlet Run: "During the Silverado drive, you spoke negatively of the shift calibration. The tested Chevy was we assume hunting between 1st and 2nd, and ranged from 5300erpm to around 2800erpm, which you didn’t seem to like. The Chevy revved very high up the hill for extended periods of time, over 5000erpm.

Ram Truck “invented” the first gear hold feature – and calibrated it – to avoid gear hunting and driving at excessively high rpm’s.
Ike is a variable grade and we worked hard to develop a calibration that appropriately manages torque on the run and other grades.
We don’t want the truck to rev high for extended periods of time and purposely hold 4,200 rpm.

Bottom line – our truck performed exactly as expected by delivering a more comfortable hauling experience, better vehicle longevity and improved fuel economy. Time to the top of the hill is only one small piece of the driving experience and our engineers take a number of variable into consideration. Ask yourself if just over one minute is worth other negative driver inputs."?

I haven't experienced any limiting in any towing I have done, but then the highest elevation I have been to so far is about 7000'.