What is the clutch hub doing during spin? It should be rotating. If it is, look up into the brake hub and see if the basket drive is also rotating. You should see the large brake spring going around. If the clutch hub is not rotating, turn washer off for a few seconds and then back on again. If clutch hub still does not rotate, the transmission is bad.
You need to pull the transmission and then grab and rotate the brake cam driver CCW. This should release the brakes and cause the basket to rotate. If that works ok, then the basket drive is ok. If the brakes release but won’t rotate, there may be clothing between the tubs jamming the basket. If rotation is good, then there is some problem with the clutch. The clutch hub rotates, causing the clutch band within it to rotate. A tab on the clutch band engages the tab on the brake cam driver which operates the basket drive.