The 3rd stage of my truck,
looks kinda like a frieghtliner but will be a volvo vn when i'm finished.
2 drive axles powered by a motor
steering which would be controlled with a micro motor (if I had one)
all wheels have suspension! with the back wheels having walking beam.
& the truck can still pull a trailer.
About this creation
The way the axles recieve horizontal movement is due to a design
similar to torsion beam suspension.
I've done a much simpler steering, non-suspension design. (You probably wouldn't think twice looking at it) The mechanism operates on the caster principle but the front wheels are in fact tied together.