What is forbidden to do after the differential is locked?
- Correct answer: To turn the steering wheel and the wheels from side to side.
- To operate the power transfer (PTO).
- To connect between the right and left brakes.
- To change gears while driving.
Why this is the answer
The correct answer in the official bank: To turn the steering wheel and the wheels from side to side.
Locking the differential makes both driving wheels turn at the same speed. In a turn the outer wheel has to travel a longer distance than the inner one, so turning the steering wheel and the wheels to the sides while the differential is locked makes steering harder and can harm control and the drive system. Release the lock before turning.