Maytag orbital xmission bad ? model LAT8600AAW ref: LAT8600

Pretty sure the xmission is bad since unit spins but locks during agitation.
How can I verify this ? I notice that the pully seems really hard to rotate by hand in the agitation direction. In fact it really hurts the hand just to get it to move even a little. Is this proof of sorts?
Thanks for any advice --Dave Moore--
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