I am having problems with my truck, with the motor not running or running doesn't matter. When you try to make a movement with the controller the servos start moving irratically. Doesn't seem to matter if you are moving the steering or the throttle, both of them start to shake, when you stop moving the servos it will quit. Any ideas!?! The truck is a traxxas about 5 or 6 years old.

sound like moisture in your reciever. take it out, take off the covers and the rx crystal, and dry em out. mine did it too

try not to use the receiver that causes the shakes. just junk it and buy a new one. i have seen a bad receiver take out 3 brand new traxxas 2018 servos just by powering it up.
and to those who think that he should fix it. try resetting the gears in the servo head. then tell me.

tell you what?

That is usually caused by Parkinson's Disease. Fortunately it's not transmittable to humans.

dont get testy! just commenting that rebuilding a servo aint so easy for a some.

testies? who you callen testies?[:'(] No. Im just sayen since he said both servos are twitching at the same time, then its prolly the reciever that has water, or some damage to it. I wouldnt rebiuld a servo either. futaba s3305 is better than a 2055, and is only $35 compared to traxxas servos at around $50.

Might be just a loose crystal?
Try wiggling the wires, and gently shaking both the transmitter and the receiver to see if that makes any difference.