Updated Unity 5 Anti Roll Script?

The anti roll script that is in this forum by Edy doesn't seem to work all too well in Unity 5. http://forum.unity3d.com/threads/how-to-make-a-physically-real-stable-car-with-wheelcolliders.50643/

The car seems to vibrate or shake when the car suspension starts leaning. Its very unrealistic and weird and I've tried to edit the script to get it to stop shaking to no avail. Can anyone point me to an anti-roll script (C# or JS) that is updated to Unity 5 and no longer has this shaking problem?

Also, is it possible to lerp the anti-roll to fix the vibrating?

EDIT: It seems turning down the anti-roll val from 5000 to 2000 fixes this a little, but it still has some shaking issues and it would sometimes suddenly jump. Setting the value too low, like 1000, will cause the vehicle to flip over.