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LEGO MOC Lego Technic lockable automatic two speed gearbox [with free instructions] by SJ_LegoFan | Rebrickable - Build with LEGO
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Two-Speed Automatic Gearbox - inspired by TechnicBrickPower - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
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LEGO MOC 4 Speed Automatic Transmission with Rotary Catch by Lego3dPrinter | Rebrickable - Build with LEGO
![Simplest automatic LEGO transmission in the world? Really functional. Principle explained. - YouTube Simplest automatic LEGO transmission in the world? Really functional. Principle explained. - YouTube](https://i.ytimg.com/vi/TjhBIw50gFk/maxresdefault.jpg)