Alian G Pocatello , ID October 11, 2015 Appliance: KitchenAid 5 And 5.5 Qt. Stand Mixer / Professional 550 - Bowl Li KV25MCXOB5 Kitchenaid Mixer Kv25mcxob5: Kitchen aid mixer skipping. How to replace Worm Gear. You tubed the problem, opened the mixer, saw the issue, bought the parts, fixed it. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes