This is a Lego sequential dual clutch gearbox 7+R speeds utilized in my Lego Bugatti Chiron 1:8.

You cannot construct this gearbox with out observe the video within the description !

Ratios :

1st : 1:92nd : 1:6

third : 1:5,4

4th : 1:4,5

fifth : 1:3

sixth : 1:2

seventh : 1:1,8

R : 1:9

Gearbox inspiration :

@Sheepo Rubicon Jeep shifting system :http://www.sheepo.es/2016/06/jeep-wrangler-rubicon-instructions.html

@ibessonov gearbox : https://rebrickable.com/mocs/MOC-5565/ibessonov/sequential-rc-4-speed-dual-clutch-gearbox-with-pf-servo-motor/#comments

More info right here :

–Eurobricks forum

– Techlug forum