TAZ 4 Y Axis Stepper Damaged

My last print failed with evidence of skipped steps on the Y axis. At the end of the print, the printer seems to have over-extended the Y-axis due to the skipped steps. The Y-axis is now binding and cannot move forward or backwards at all.

At first, I thought that the Y-axis must have come out of alignment. However, after loosening the belt, I see that the bed still slides smoothly and the problem is actually that the stepper is resistant to turning (the printer is off and stepper is unplugged). I don’t see any contamination of the stepper. Is it possible that the stepper overheated and melted something to increase the turning resistance?