The FLT guys talk about "holding full throttle unless the speed limit is reached, let the engine and trans do it's thing..." during their runs.
Didn't the 6.4 gas engine derate itself to hold in a gear rather than scream to the governor then upshift then lug down then downshift then scream to the governor then upshift and lug down then scream to the governor?
I heard there is a movement that is gaining momentum to replace 450HP 12 and 15 litre 84,000lbs GCW linehaul engines with 440HP Power Strokes now that torque doesn't matter. Big weight savings to be had...