Spin Cycle will not spin

Spin Cycle will not spin

I have the Kenmore 90 Series Washer (11028922790). Washing , Rinising and draining working fine but the spin cycle does not spin. If I did a manually spin at spin cycle and then depress the timer and turn 360 degree to the same spin cycle and pullout knob (same time manually spin ) doing this few time. The spin cycle will start to spin back to spinning speed. Can you tell what's the problem.

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