Scott E Bristol , TN March 25, 2016 Appliance: KitchenAid 6 Qt. Stand Mixer KP26M1XMR4 Kitchenaid Mixer Kp26m1xmr4: Worm gear worn out. How to replace Dryer Drum Support Roller Retaining Ring. Removed housings, retaining clip and gears, replaced in reverse order. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes