Wanted: feedback from drivers late model 300-340 Cummins

Ductape wrote:
The short version: if you have a recent Cummins 300-340 hp range does your coach hold 6th gear crossing interstate overpasses and mild grades? Or does it downshift at any mild rise?

Thanks for your feedback, and if you want to read all the whys and wherefores, the next post I'll drone on. :B

neighbour has the 360 ISB in a 2017 tiffin pulls his ford F150 CC 4x4 and says severely lacks power in the hills(loaded pulling truck)
I guarantee you it will downshift when in the situations your asking about