WTW4816FW3 Whirlpool Washer

First pry off the cap of the agitator. Then using a socket remove the bolt that holds the plastic cup in place. Remove this cup by prying it loose from the two tabs that hold it in place. Once this cup is removed you can get to the broken cogs.
Slip the new cogs into the underside of the cup, and slide the cup back down in the a ... Read more gitator housing using the slots on the side for a guide. (You may want to remove the entire agitator and assemble everything upside down, then flip it all back over to mount, so the cogs don't fall out).
Tighten the bolt, snap the cap back in place on top of the agitator and your'e done. Easy repair.

pull off softner dispenser, pop off agitator cap by inserting straight screw driver into small slot, remove bolt inside agitator with socket wrench and long extension, pull agitator straight up off shaft, place agitator on floor, with feet holding bottom half pull top half apart from bottom half by pulling straight up, note direction of o ... Read more ld cogs remove and replace with new, reassemble

Pulled off the dispenser. Used socket set to remove bolt. Removed entire agitator out of washer. Placed both feet on bottom of agitator and then pulled up on the upper agitator. It took some muscle due to the years of washer use. I used a flat-head screwdriver to weaken the plastic clips holding down the old bearing-driven cam. Once ... Read more I got the upper agitator off, the guts were easy to pull out. Then I just re-assembled with the 3 new parts (the Cam Driven, the Dog Ears, and the Bearing-Driven Cam).