The tremendous torque loads generated by a Pro Stocker during acceleration can actually distort a fabricated steel rear end housing, bend the axle, and generate side-loads on the axle bearings. Not only does this hamper performance, but it can contribute to axle "walk out" and potential breakage.

The Evolution 4.1 housing end kit contains all the parts required to convert the MW symetrical housing ends (11-3/4" disc brakes) to the spherical-aligning bearings. The housing ends are 1-1/2" long and will accpt butt-welding to a 3" or 3-1/4" diameter tube. The kit includes the standard backing plate bolt kit and special hardened axle lock rings. Axles with serial number 27482 or later can be used as they have the necessary seal surface ground behind the bearing and increased straight section length for the wider bearing and lock ring.  Installation - Service instructions can be found on Service Bulletin #0087.