Why won't my washer spin even though it still agitates?
I'm not completely sure how the drive elements connect up on this. I know there is no belt. Gear box seems very unlikely. You should examine how the agitator attaches to the drive shaft below the top cap of the agitator. Sounds like it's slipping, and if that's the case, it may not be able to spin either. If it works differently than I think, it could be the clutch slipping. To get to the clutch is major surgery. You'd have to remove the agitator and would discover any slipping parts here on your way to the clutch any way.