It sounds as if the belt is slipped. It smells a little, like burning.

If your machine is a FAV6800AWW/FAV9800AWW take a look at this post Spin cycle locks up.

I believe this forum member’s clutch pulley is locking up in the wash cycle. Pull the 120VAC plug on the machine to remove power. You need to remove the front cover to inspect the Clutch Pulley and see if you can rotate the Clutch Pulley Counter Clockwise the spin direction then Clockwise the wash/agitate direction. The rotational resistance should be free and very light. Post back with the results and we will go from there.

Here are some links for the Service Manual.

The Service Manual for reference. Sears Parts Direct for reference.

Raise the top of the machine. Insert a flat blade putty knife approximately 2.5” from the left and right sides of the washer top, depress the spring tabs securing machine top to the washer base. See page 33 of the SM for putty knife insertion point. With a 5/16 nut driver or 5/16 ¼ socket on an extension to remove front panel see page 41 of the SM