When the vehicle turns and the two wheels on the axle turn at different speeds, the unit makes a clicking sound as the square-cut side gears move over and past one another. Off-throttle situations, where the diff is unloaded, leads to a partially unlocked unit. In mechanical lockers, also called automatic lockers, on-throttle driving conditions, where load is applied to the differential, induces locking. The Spartan Locker is flanked by a Yukon Grizzly Locker (left) and a Yukon Zip Locker (right). The Yukon Zip Locker is an air locker or selectable locker that uses a pneumatic system for actuation. The Spartan Locker and Yukon Grizzly Locker are mechanical. A mechanical locker is always active, providing traction 24/7. What are the Different Types of Lockers?Ī selectable locker is an on-demand unit that the driver activates electronically or pneumatically via a cockpit-mounted button. Lockers come in two flavors… selectable or mechanical. A locker physically joins the drive axles together so they deliver an equal amount of torque to each tire, regardless of available traction. The Spartan Locker, USA Standard Gear’s lunchbox locker, provides game-changing traction at a low cost.

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