Well, in fact you can make some animated chains and import the animation also , and use some simple box collision, depending
on the terrain if it is flat or not !

The thing is, that I don't want to use "c_move" for that. I want it to be physical. I've already made the one with "c_move", works very well, but not as I want it to.

with my method you can use the wheels-physic. the positions of the pathpoints
set in the script in a while-loop and move the passable chain-parts from
pathpoint to pathpoint. its a little bit tricky but will look very
realistic.

Look at the example from Quadrax. That looks really realistic Thank you all for you help guys, I really appreciate it