Yes they might be planning on using the same 5 gears as they use now, with a second set to give a mid-range for each of those 5 gears, giving a total of 10 speeds without the need to build 10 separate ratios inside the transmission.
But who knows, it is still early in the design process.
I would also imangine they can now have a two ratio reverse gear too. Perhasps a low ratio used while in the tow haul mode, and a second ratio used only when not in the tow haul mode, so they can go a little faster in the higher range. This might prevent a current problem, the transmission overheating while backing up with a larger fifth wheel attached. The transmission heats up mainly because it is not turning more than a few dozen revolutions on the output shaft in a minute, but the input shaft needs to turn 900 - 1800 RPM to develope enough horsepower to move a larger trailer onto leveling blocks, or to get it up a steep driveway.
Fred.
