Originally Posted by kmags

Before adjusting turnbuckles, set all transmitter steering trims to zero and any sub trim to zero. Turn Radio on. Servo arm should be at 90 degrees. If not then the servo arm is not on the splines correctly. If it is close to 90 degrees but not dead on then correct it with sub trim (if available). Correct the arm (if needed) and adjust the turnbuckles so that the truck turns straight without using the trims. Use the trims for fine adjustment after this. This way your steering is centered and the same side to side.