You are going to have to remove the inner basket. Here are some instructions. Start by removing the front panel which will give you access to the screws that hold the top in place. The agitator will pull up but it is hard to do and may require hooks. When you replace the tub cover and gasket be sure to install a new cover gasket.

Good luck. Here is the procedure from the service manual.

Washtub and Balance Ring

1.Open loading door.

2.Remove agitator.

3.Loosen cabinet top, .

4.Hinge cabinet top open to gain access.

5.Loosen and remove hose clamp and fill hose from outer tub cover.

6.Remove tub cover, see “Tub Cover and Gasket”.

7.Remove bolts and washers securing washtub to hub.

8.Lift washtub and balance ring out of outer tub. NOTE:When removing washtub and balance ring, DO NOT lift up on balance ring damage may occur. Grasp top flange of washtub and remove from outer tub.

9.Reverse procedure to reassemble. NOTE:When installing washtub, verify lint filter is between underside of washtub and hub.