Since you have the motor off the suspension compensator it reminded me, did you ever find what was allowing all the play in the motor armature? Now would be a good time to turn or push the worm screw by whatever means in both directions and see if there is any play at all. There should not be any more than minimal backlash so if the gear can "screw" in or out to account for the 1/4 inch play you had it needs to be fixed.
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