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Old 10-12-2002, 06:11 PM
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Yes there is. Simply, in a locker the axles are locked together until ther is enough torque differential between the two axles (such as in a turn) to unlock the axles. In a posi the axles are held together by the pressure of the preloaded clutch discs. Once this preload is exceed, (such as in a turn) the clutches slip. I've used both. I like the locker better, but it does give off some noise when it unlocks. The posi is quieter and requires a limited slip additive, where as the locker does not.
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