The constant 5 Nm torque is probably to prevent backlash in the driveline when setting off. Best to keep all the gears, shafts etc under a slight preload so the

The constant 5 Nm torque is probably to prevent backlash in the driveline when setting off. Best to keep all the gears, shafts etc under a slight preload so they don't "clunk" when you start accelerating. Much easier on the components, and better comfort.