Replaced the shaft seal and push on nut. I also replaced the Solenoid Assembly as it was pretty corroded and rusted up (from water leaking on/inside it) so while I was in there I did that too (did not have a problem with draining as most when replacing this part), just replaced it instead of waiting for it to fail.
Directions were clear, and easy to follow. Appears the seal in the unit may have been installed wrong at the factory? (lip was facing out) instructions say in. Either way, once installed no more leak.
Helpful bit of advice to remove the seal (they used a screw driver in the video and it looks like it damaged the plastic housing a bit), use either a paper clip, safety pin, or something like that to hook it and pull it out (like a fish hook). Worked first shot with out marring the plastic housing.
Great price and parts delievered on time (needed to repair) as the water leak was pretty good on unit (and that solenoid is only 2-3mm off the floor), so I couldn't put anything under it to catch the water.