Seller notes

These Ford 9 inch third member assemblies feature a limited slip differential available in 31 spline axle shaft configurations. The clutch style posi-traction unit is a proven combination and a better alternative for street driven cars vs the more expensive locker and spool options that are often overkill and not nearly as smooth on the street. It features heat treated spyder gears and spring loaded clutch pack with improved grip over OEM design. This unit is based off the proven original limite...

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