Locking Differential (Diff Lock)

It can be operated by air, electricity or cable. It is common on off-road vehicles and some pickups. It should be used only on loose surfaces. Rear lockers are most common; front lockers make steering very heavy and are used mainly at very low speed. A warning light usually shows when a lock is engaged. Electronic traction aids are often switched off automatically when a locker is engaged.

A locking mechanism connects the two axle shafts directly.

Using it on grippy roads makes steering difficult and stresses parts. Unlock before driving on paved roads.