Maytag MAV6300AWW won't spin

Hi,
My Maytag MAV6300AWW won’t spin, but will drain and go through the cycle. What I’ve tried, tipped up the machine, pulley spins and works and can turn both ways. When up top, tub is locked always and wont spin.
Please help.

It worked! I hit it with a pair of pliers while running and it engaged, now it works but makes a loud screech when it stops so the thruster bearing is bad I assume that will fix all that?