Why must the differential lock be immediately switched off as soon as the truck returns to firm, dry pavement?

1. On dry pavement, the locked differential prevents wheels from rotating at different speeds in turns, causing severe driveline binding, tire scrub, and potential axle shaft breakage
2. The differential lock will cause the fuel tank to leak
3. The engine will run out of oil
4. The vehicle cannot exceed 10 km/h with the differential lock engaged