LEGO MOC Sequential 8-speed transmission tunnel with rotary catches and 8-to-1 gearblock by Didumos | Rebrickable - Build with LEGO
Amazon.com: Sequential Dual-Clutch Gearbox (DSG) 8 Speeds Engine Tech Model, for NASA Series Space Wars Building Blocks Toys Set, MOC-14405 Compatible with Lego NASA (1434 Pieces) : Toys & Games
Building instructions for 10 speed sequential gearbox used for RWD applications
LEGO TECHNIC Sequential Gear Box with Building Instructions ! - YouTube
LEGO Technic 8 SPEED SEQUENTIAL GEARBOX V3 with Instructions | Lego technic, Lego, Building instructions
LEGO Gearbox – Seven Speed Plus Reverse | Hackaday