Mark M Frenchville , PA January 24, 2016 Appliance: Whirlpool 4 1/2 Qt. Stand Mixer Classic - Tilt K45SSWH-0 Whirlpool Mixer K45sswh-0: Mixer was turning. How to replace Worm Gear And Bracket Assembly. Replaced the worm gear assembly Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes