Algodoo

This is a Jeep Wrangler 4x4 I'm working on.
If you look above it at spawn you can see where I got the general dea for the look of it from.
I did (and am doing) a lot of custom parts on it by eye and from memory(It's my dream car irl)
It's no where near done yet and as you can see it sufffers from a problem all my cars do. I can't get the suspension right and the tires vibrate the whole car
If you can help me with this problem PLEASE comment on it. Many thanks
OblongK