Top Load/Stack Sears- Kenmore 417.9 Won't Agitate in Wash Cycle

My Kenmore-Sears 417.97812701 will not agitate in the wash cycle. It will fill, drain, and spin on spin cycle. Open the lid the and spin the drum paddle freely in both directions without resistance. I am not sure what has gone wrong?

I'm assuming it could be belt or clutch, but probably not the motor control board, due to the fact there is free spin on the paddle.

Thanks.