Kenmore or other brand name parts in your recent-model washer are powered by a washer part called the motor coupler. This is made up of three disks or star-shaped parts that interlock. When these washing machine parts begin to wear out, they can slip and cause a lack of movement for the agitator or spin basket. To inspect the disks you will need to open the washer, find the pump and motor and remove them. On the back of the motor is a shaft that holds the motor coupler. Inspect the interlocking disks. If they are damaged you will need to replace this washer part with Maytag washer parts or whatever brand your machine requires.