Darrell M Freeport , IL December 04, 2017 Appliance: KitchenAid 6 Qt. Stand Mixer KP26M1XNP4 Kitchenaid Mixer Kp26m1xnp4: Would not run without a noise like gears grinding. How to replace Transmission Gasket. Replaced just one gear. Works fine. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes