Wheel colliders damper is too strong when car is stationary

Hi all,

I am working on a prototype where I would like to move a car by pushing it on the sides with an AddForce function.

However, when the car is at a complete stop, I can't move it as I want, the springs seem to absorb everything (first two clicks on the video). But ifI apply a small motorTorque force to the front wheels (0.01f before the last two clicks) then the movement seems to work properly...

I'm very new with wheel colliders and I cant' find what is the variable/function that causes this change in behavior depending on whether or not a motorTorque is applied?

![alt text][1] [1]: /storage/temp/202893-carpush.gif

Best,

Antoine