Powertrax No-Slip drop in locking differential for 27 spline Chrysler 8.25 rearend....Typically found in earlier Jeep Cherokee XJs up to 1997 when they started using 29 spline axles... I believe this axle was used in a few other Dodge vehicles as well such as Durango, ect... I bought it for my Cherokee a couple years ago and never put it in, it is brand new, never taken out of the box.... This unit currently sells on Amazon for over 500.00, looking to get 350.00 OBO