A locker, or locking differential, is a type of traction adding differential A locking differential essentially locks the axle shafts together, transferring all of the power from the ring gear to both axle shafts, regardless of either wheel's lack of traction Where limited-slip differentials are normally "unlocked" and only begin to function when one tire slips, a locking differential, except for an air locker, is always locked, and only "unlocks" to allow for wheel-speed differentiation when cornering A locking differential is typically used in a rear-axle application; a locker installed in the front axle can impair steering
A locker is a small metal or wooden cupboard with a lock, where you can put your personal possessions, for example in a school, place of work, or sports club