BACKING OUT THE SCREW WILL LOOSEN THE SPRING THERE FOR IT WILL BE A SOONER SHIFT IFF YOU TIGHTEN THE SCREW/ SPRING IT WILL TAKE MORE TIME AND FORCE TO SHIFT THERE FOR YOU WILL HAVE A LATER SHIFT. FROM EVERYTHING YOU SADI IS SEEMS TO BE SHIFTING WAY TO SOON TIGHTEN IT UP. FACTORY SETTING IS FOR THE .16 MOTOR YOU ARE RUNNING A WAY MORE TORQUER MOTOR AND WILL CAUSE THE CAR TO SHIFT SOONER CAUSE IT IS HITTING THE TORQUE RATING FOR THE SHIFT POINT MUCH FASTER THAN THE .16 WOULD