LEGO MOC 12 Speed Gearbox by TechnicBrickPower | Rebrickable - Build with LEGO
LEGO MOC 8-Speed manual gearbox by Whathetech | Rebrickable - Build with LEGO
Lego Technic 8 speed gearbox using just two levers!? Impossible? - YouTube
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's 2018 Bugatti Chiron kit has functioning transmission and 16-cylinder engine
LEGO Ultra Compact Sequential 8+N+R-speed Gearbox with Instructions! - YouTube
MOC] LEGO Technic - Sequential 8-speed transmission tunnel with rotary catches II - YouTube
LEGO Technic 5+R Speed Transmission Gearbox -car truck NXT EV3 - new parts | eBay
Ultra Compact 8+N+R Sequential Gearbox - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums