I have what I think is a similar issue with the servo appearing to have trouble finding center.

However, this is only with NO LOAD.

When I have the chassis supported with no load, the servo shudders pretty badly. As soon as I let the front wheels simply touch the surface it stops immediately, and appears to be just fine. So far, while driving normally, it also appears to function properly.

Is this more than a cosmetic issue? I would think the shuddering could prematurely wear the servo, but looking to get others thoughts. Nice servo other than that. To be clear, as soon as I apply load to the servo and turn left or right, it seems just fine at getting back to center. The shakes under no load is pretty bad though, more than just a bit.

If it truly doesn't effect the life or performance of the servo, I can look the other way until I set the car on the track.