A quick demonstration of the function of a manual locking hub. Manual locking hubs can exist on solid axle vehicles as well as vehicles that use cv axles. By unlocking or disengaging the hub in 2wd, you obtain better fuel economy as you don’t have the drag of the front drivetrain that’s not needed. In 4wd, you would want to have the hubs locked or engaged to use 4wd. If unlocked in 4wd, you basically have yourself 2wd vehicle as the front axles can’t turn the front tires. Note that some vehicles have automatic locking hubs that don’t require turning a knob and some vehicles don’t have selectable hubs and are always “locked”
Hubs shown are Warn 29091 Premium locking hubs for certain 28 splined vehicles (verify your vehicle's fitment)
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