Watched some Youtube repairs. My mixer was quite different in the way it opened, and in the gears inside but I had the right idea. I could see the worn gear teeth. I could see that the other gears appeared perfect. I was glad it was a gear on top, easily accessible, and not below where I had thought it would be. I think on my bowl-lift Pro model removing that must be much more difficult. The only difficult move was removing and installing the snap-ring without snap-ring pliers. 90 - 100 degrees of the gear had extremely worn, not broken teeth. So I had greatly abused the mixer with stiff bread dough. Also have the DC motor KitchenAid, their most powerful; but even that will not make the number of loaves of bread advertised (I use 375 gm. flour/loaf). Guess I will have to get a Hobart. The mixer made ugly gear noises for the first 20 minutes though I had smeared the gear with the abundant grease inside. Now it sounds and works as it did when new, thanks to AppliancePartsPros and to the folks who posted web pages.