I have a whirlpool washer. I replaced the transmission with shaft about six months ago. It was working fine.
The agiator goes back and forth but the top agiator that is suppose to turn the cloths down in the tub is not working. I removed the softner cup and o ring lid to check if the nut was tight inside. It was. Any suggestions. system is about 10 years old. Also replaced the plastic coupler and rubbers.
If the lower half of the agitator is doing it’s back and forth thing but the upper half ain’t, then you need to replace the agitator dogs (or “dawgs” as they say at my alma mater, the University of Georgia).