How to Troubleshoot & Replace Whirlpool AP7020088 / W11550891 Agitator

Replaced the agitator. Installing the new one was a breeze. 

Drilled out and removed snapped bolt with screw extractor , replaced agitator and bolt. 

Unbolt, set in, tighten, done 

Replaced agitator 

Replaced agitator 

Replaced all parts from agitator thru the clutches below and drum drive plate. back online. Running well Thank you for fast shipment 

Replaced with a new agitator 

Had to remove the agitator and I broke it. It was stuck to the shaft. Once it was removed the drive hub was exposed. Removed the screws and waited for parts. Installed the parts and recalibrated the washer with the help of Youtube. 

I thought the problem was the agitator, but I was wrong. It was the tub hub, but my agitator wasn't in the best of condition. It was dirty and the spline was starting to round. I am going to keep the new agitator and screw, but have also ordered a new tub hub..The original one's splines are as smooth as a baby's bottom. 

Replaced the gear box and agitator. Obviously there were two problems. An internal gearbox problem causing the noise but the washer was still functional so I kept putting it off. Then the splines for the agitator and gearbox connection started to slip. This made it non-functional. I watched the video here and the job went very smooth.