Reginald L Warren , MA March 13, 2016 Appliance: KitchenAid 6 Qt. Stand Mixer KP2671-3 Kitchenaid Mixer Kp2671-3: Gear box bearings wore out from not being greased when the mixer was built. How to replace Stand Mixer Lower Gearcase Housing. Took mixer apart and ordered worn and bent parts Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours