Replaced sacrificial worm gear and housing gasket as unit was leaking oil as well. Evidently, the gear is designed to strip if mixing paddle jams. You will need to remove two pins that secure the outer most housing and the worm gear. For this you will need a set of small pin punches (3/32 & 1/8”). I did not replace the grease. I’m hoping the new gasket eliminates the grease seepage.