Hi yzhong
The first thing I would check is a foreign objects stuck between the inner and the outer tubs. That could cause an ear piercing sound.
Also, one of the most common problems with this kind of the Maytag washers is a bearing on the pump. It could cause the motor to overheat and stop. After it cooled down you were able to restart it.
- The part number for the pump
AP3447809
- Her are the break down diagrams for the Maytag washer
Model MAV6000AWW
Good luck.
Gene.