Washing machine is about twelve years old. I could not determine where the high pitched squealing noise was coming. I began by changing the belt but the noise continued. Changed the snubber ring and the noise continued. The water pump was the next suspect. There was a fine black powdery residue all around the pulley and bearing area of the pump. Changed the pump and the squealing has stopped. It appears that it was the bearing in the pump that was making the noise.