agitator

im not sure of the model # cause im at my day job right now…fixin appliances is my side job/hobby…the electrical part is my forte’ so mechanical stuff takes a backseat sometimes…i have a washer right now…GE…that is working fine except the agitator is free spinning and doesnt agitate during the cycle…how do i change this thing?..i cant figure out on my own how to take the old one off and put on a new one…do i do it through the top or do i have to remove the tub and go from the bottom??..just wondering…if somebody could help id appreciate it…sorry about the typing!!

thanks…ill try puttin some butt behind it and yanking up!!