Lego 10-speed truck transmission with splitter, basic design

How to build Lego 10-speed transmission for mid-range and linehaul trucks. 5-speed main gearbox with reverse gear plus splitter unit. Simple and compact basic Lego design for builders without direct inspirer from real transmissions. More my Lego transmission ideas: www.lugnet.com/~3813/ (ad blocker recommended).
In this clip:
-building starts 0:08
-transmission ready 1:44
-ratios & shift pattern 1:52