Hi, not sure, I guess it depends on the application (speed, power, driving, gearing, etc). Anyway, in that case I would start searching for a higher torque, metal (worm) geared dc motor and try to find more info in some introductory videos such as ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Q6BvTTaS3eM.html. Good luck!
In this video you can see the motor pinion is a worm gear. It won't allow the motor to be driven by the output. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-xP1iDDszdqk.html