Unplugged the power supply, removed the kick plate, then unplugged the drain module.
Removed the drain module. Cut and removed the old push-on nut from the shaft. Removed the shaft seal. I wet the new seal and installed onto the shaft. I installed the push-on nut holding the end of the shaft until it is seated properly to hold the seal securely in place.
Reinstalled the drain module and connected the wiring harness. Plugged the power supply and ran the dishwasher through a quick cycle to make sure everything was working fine. It worked and no more leaking. I reinstalled the kick plate and good to go!