[Espeefan]

Ditch the stock plastic rod ends for something better. I've had good luck with Traxxas rod ends, using a 3mm bore through the pivot ball. You might want to double check that all the screws are tight on the tie rods, and servo drag link. Might as well make sure the servo horn is tight to the servo shaft, as well as double check that the servo mounting screws are tight. Grab the tires and wiggle them by hand to see where the slop is coming from. If you have a servo saver on the truck, get rid of that and replace it with a solid (plastic or aluminum) servo arm. Servo savers have a lot of slop in them.