I've had my 04 for about a year and a half. Installed Superchips about 8 months ago, and just had a real strange occurance. Turned on the car and the speedo starts bouncing from 0 to 120, then stops on 90. I put the car in gear, and the speedo sits in 200 until I reach 45 mph, then it registers correct speed. When the speed falls below 45, speedometer bounces from 0 to 200. When I stop, it registers 90. I reprogramed with Superchips, and it has been normal . Any similar or other happenings with Superchips? Any explanation?