@clemens:
code:
<edit>newer code above!</edit>
i haven't continued working on it but this is my current code... the car doesn't jump around but the front wheels don't rotate properly (see screenshot below) and so i can't steer. driving forwards and backwards works! [Smile]

the wheels are attached stiffly. i though the wheel constraint has dampers? is that what the spring/damper constants should set?