Lego 12-speed truck transmission with splitter version B

How to build lego 12-speed truck transmission. 6-speed main gearbox plus splitter unit. Version B with studless frame. Very basic and compact design. Check also www.lugnet.com/....

[@A77uros]

Same transmission with brick frame available at th-cam.com/video/FQR8hQqBdyo/w-d-xo.html.