
I got it used, and all I've done to it is swap the gearboxes, and the radio system. It did not do this at first, somehow seems to have gradually developed a pull to the left when wanting to just go straight forward. the tank has done this even after changing the plastic gearbox to steel gearbox, and even changing the Rx to a different one then back again (the new one didn't have the sound volume jack and made annoying whining sounds). It has the plastic sprockets and idlers. I checked the tightness of the idler wheels, even lubed the plastic road wheels with silicone shock oil because they squeaked - I can't think what it could be -does anyone know how to fix this problem?