Servo chatter at idle????

[Joey]

I recently reassembled my esavage as I had taken it apart for maintenence abotu 9 months ago and never got around to it. It runs fine, but I noticed that when the truck is still, the servo has a barely audible chatter, like it is moving on its own back and forth VERY subtly and very quickly. It doesnt turn the wheels at all as it is a very weak movement. Has anyone had this issue?? I have an aftermarket hi-torque servo, and it ran fine the last time I ran the truck, 9 months ago (haha!). It doesnt affect drivability at all.

[Kostaktinos_mt]

could be a lot of things...
radio noise and/or servo self-throw are the two most common...

[Joey]

What is self-throw? And Ive been wondering... even with my "high-torque" servo, the wheel turn speed is still pretty slow conpared to buggies and watnot. Is this the nature of the beast for MT's, or is there a way to inscrease the servo speed?