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Message: <blockquote data-quote="4play" data-source="post: 1310185" data-attributes="member: 7223">There are a few factory optioned lockers out there, and quite a few limited slips.  The main difference is a limited slip will bias torque to both axles of the differential until a calibrated threshold is met and then the limited slip "slips" and spins the axle with the least amount of traction.  A locker mechanically locks both axles to the differential and will not allow one axle to spin/slip vs the other, if that happens and if your lucky the locker will have un-locked.  Lockers will always have the advantage in extreme off-road driving.  I dont think I would ever say a 4-wheel drive is basically a 2-wheel.  Is has the ability to power all 4 wheels but seldom at the same time ( unless lockers are used )  I would almost never say a 2wd with a limited slip has the same advantage as any 4wd.</blockquote>