4 Speed Gearbox DIY Transmission Kit For Power Functions Building Blocks MOC Style Brick Set With Easy No Fuss Assembly Of Loose Parts Compatible With M Motor And Battery Case Ages 15 Plus

4-Speed Gearbox DIY Transmission Kit for Power Functions
✔️ 1SET gearbox bricks, loose parts, assemble yourself, fits M motor

This MOC 4 Speed Gearbox is a DIY transmission module designed for building-block fans. It’s commonly used in Power Functions projects and custom MOC builds, and ships as loose parts to be assembled by you.

✅ 1SET gearbox bricks pack
✅ Loose parts; you install them yourself
✅ Suitable for ages 15+
✅ Color shown in picture
✅ Material: ABS
✅ Package: OPP bag

💡 What is a 4 speed gearbox kit used for in Power Functions builds? This handy component lets you add controlled speed changes to small machines.
- handy for teaching gear ratios in compact projects
- great for adding motion to LEGO-style builds using Power Functions
- easy to wire with M motor and battery case in compatible setups

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