I know what op is talking about, it feels like the whole truck bogs down as a self preservation feature.
Sometimes happens when hesitant with pedal and sometimes when fully committed to the throttle.
Perhaps it is triggered when the truck thinks it is on an incline or decline.
When I researched the raptor line on YouTube I happened across 2 videos that claimed if you put it on quiet mode and snow mode then drove sensibly that you could achieve 20+ mpg.
well they lied…