I guess you could live with a perfectly Talking Thomas but doesn't run well or you could take a chance on fixing him and having a perfectly Talking Thomas who now runs well. Also the knowledge you gain for the experience of swapping out a gear will help you with all future repairs too. Check YouTube to see if there is a video showing someone opening up the same Thomas you have to do a similar repair to get an idea of what it looks like then, why not take a chance?
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