Originally Posted by Hardware02
When multiple trucks are linked with rigid towbars like that I assume they have to all shift gears at the same time? All trucks have the same engine/transmission & gear ratios?
One of the linked videos shows them getting under way and yes, they all appear to be identical tractors and they all shift at the same time. Maybe they have a cox on the radio who shouts commands: "Prepare to upshift. Shift 1 Lo, 1 Hi. Shift now, now, now." They probably undergo training to all use the same shift technique and timing.