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The gears -and the red plastic pushrod ends- break because they are under excessive load by the motor as it tries to move the top. The motor encounters excessive resistance because the slider tracks are dirty. They are dirty because their lubricant grease traps and holds abrasive dirt carried in by rain water. Because their lubricant grease slider tracks are out of sight they are neglected. They get dirty, won’t slide easily, causing excessive resistance to the movement of the top mechanism, and eventually something breaks, either the plastic gears in the top transmissions or the pushrod plastic end. Solution: periodically clean and regrease the slider track and plastic slider. Broken gears and pushrods are not design failures, they are maintenance failures.
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