I have a Kenmore washer model 110.81310120 (Whirlpool) that's about 15 years old. Just recently the agitator will only go in one direction in wash cycle, not back and forth like it should. When it tries to go in the back direction, I hear a gear slipping, or not catching, not allowing it to go the other way. It spins fine. I was able to remove the agitator, and saw nothing that looked like agitator dogs. It is a direct drive machine. Any idea what the problem might be?
TIA,
Jack