Bryan D Genoa City , WI February 20, 2017 Appliance: Whirlpool 4 1/2 Qt. Stand Mixer Classic - Tilt K45SSAC-0 Whirlpool Mixer K45ssac-0: Ran on high speed only. How to replace Governor Drive Stud (Speed Governor). Replaced speed control parts. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes