Chosen Solution

Need to remove the Agitator and replace the Tub Drain Seal

You may not need it. The Agitator lifts straight up and off the plastic drive bell with a firm pull.

I found a service manual for your washer online but you need to pay a 10 USD fee in order to download it. Kinda your choice if you want to pay it or not to get the file but here you go. GE Top Load Washer WLSE3150A0WW Service Manual Update (09/16/2018) Try @mayer ‘s solution first, then if it does not work I would invest into getting the service manual.