You Tube is my friend…..I looked up common issues with the KitchenAid mixers, and saw how to take it apart with “ease” - discovered the broken plastic worm gear; Appliance Parts Pros had a great part breakdown and I was able to locate and order the replacement gear (I bought some washers as well but was able to re-use the existing ones) within about 10 minutes. Received the parts in about 3 days and put it all back together successfully - a refurbished wedding present for a friends’s kid that works like “new”.