This may be a silly question but for the life of me, I am unable to get the agitator put back into place. I had replaced the worn coupling which resolved the initial problem that I was having. However, now I am unable to push the agitator down hard enough to lock it into place. It keeps popping up and off during wash. I did order a new agitator thinking that the new coupling may not be compatible with the old agitator but is there something that I am missing in getting it reattached?

Thanks.. I do have an new agitator on order and think I will give that one a whirl. I did notice that the some of the plastic has been chewed away on the splines. I think that once I am actually able to get this part back in place.. it needs to stay there. I appreciate the info.