I won't even pretend to know what they have going on but I do know they do extensive! Datalogging with lots of info.
Just speculating but I'm thinking that's just an unlock. A down shift would be a much larger jump n rpm I would think. Who knows tho.
I also know they r good at setting up their truck to hook hard!
They've got things pretty well figured out! Both Power & putting it to the ground!!! Really impressive IMO.