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SPEED ZONE

Tips for servicing your speedometer

Figure 1

By Steve Turchet

any vehicle owners who are competent enough to rebuild their
own engines and transmissions will go on living with a non-
functional, inaccurate or noisy speedometer. It’s as if there was some
great mystery in how a speedometer works that intimidates people.
The basic principle is illustrated in Figure 1: There’s a little rotating