MOC-5234 LEGO compact 4-speed paddle-shift gearbox | MOC FACTORY
RD711 – Gearbox 4 Speed Small 1 – Bouwstone.nl
Never really built a gearbox before but knew the basics of a 2 and 4 speed boxes so i smashed them together and build this kinda small 8 speed gearbox : r/legotechnic
LEGO Technic 5+R Speed Transmission Gearbox -car truck NXT EV3 - new parts | eBay
LEGO ULTRA COMPACT 4 SPEED GEARBOX | Created by Lego Technic Mastery https://bit.ly/2YLs8wj | By Beyond the Brick | Facebook