I think it's the easiest to just copy and modify a Reddit post by me in here:
Techniques needed.
I guess this one is quite hard to deal, but does anyone know a technique to build a pendular axle that steers, can take portals (planets), uses suspension and has a (locked) differential? I know I'm aiming high but if someone knows something to unite all of this, would you please be so kind and let me know?