I have a question relating to the speedometer in my car. I bought a 1970 GT 1900 only a few days ago. But I am having a minor problem. The speedometer has stopped working for all practical purposes. The magnets on both the tach and speedo were weak, it seemed, when I bought the car, because the needles would always bounce when first accelerating from a stop. Now the speedo only occasionally moves, and when it does, it gives an inaccurate speed reading. Does anyone know of a solution that does not involve installing a new speedo?