Frontier Spartan Locker

its a mechanical locker that uses springs and ratcheting system to allow for independant drive wheel movement when there is no torque applied to the drive wheels. when torque is applied, the ratcheting gears lock, and both drive wheels turn giving you more traction.

this is for the rear axle, you already have an electronically actuated locker from the factory.

looks like a similar design as a detroit and i know people who daily drive with them with no issues.