Trying to create a vehicle without motor that´s rolling downwards

@vr_marco Thanks for your answer. I tried it, but i think i´m lost. Do you have a tutorial for that case?
Is in your case the body and the wheels one mesh or are wheels attaches via blueprint or in editor?
And @Astrotronic : Yeah this is much more i needed and there are many things i have to change. I´ll hope for a simple solution but if there is nothing possible i try to simplify theChaos vehicle