Whirlpool WP9703351 Bearing, Worm Gear OEM Part

Opened up transmission housing and removed all gearing to inspect for worn parts. The Professional 6 is all metal (except for the transmission housing cover) so just a couple of gears looked worn. Planetary needed adjustment, although the gearing was solid. Replaced the transmission housing cover with a new metal version. Cleaned out the old grease (all that grease...) and repacked the gears. Closed it up, ran it for 30 minutes to set in the new grease, and everything sounds smooth and quiet. Two things if you decide to try this very doable rebuild: You will need high-quality snap ring pliers. I fought with that thing for over an hour because my snap ring pliers were substandard. Also, be prepared to deal with grease. Lots and lots of grease. I also give Appliance Parts Pros highly my highest recommendation for quick service and high-quality parts. They were a pleasure, start to finish (especially Tiffany B).

I had reassembled my 12 year old mixer after replacing the pinion gear and lower gear housing. When I tested the mixer, there was a rhythmic clicking noise. Upon closer examination, the worm gear showed wear. I ordered the thrust bearing and worm gear bearing because this assembly seemed loose in the housing when turning the motor by hand and the parts seemed worn. Once I replaced the front, rear and thrust bearing, I found that the main gear was still trying to bounce out of the housing. When turning the motor by hand, I found a spot where movement was "rough". I disassembled for the umpteenth time, and flossed between the teeth of the fine toothed gear. There was the tiniest of metal pieces stuck between two of the teeth. This was causing the bounce of the gear and a clicking noise when the mixer was running. Now the bounce is gone and the noise is gone as well. Success!

PURCHASED AND REPLAED GEARS IN HOUSING HEAD. APPLIED AMPLE NEW GREASE AFTER REMOVAL OF ALL OLD GEAR GREASE. KITCHENAID NOW WORKS GREAT