How Does It Work?
The working principle of transmission speed sensors is very simple. It normally has a magnetic coil and reluctor ring. The reluctor ring is configured on rotating components existing in transmission like the output shaft. When components rotate they pass through a magnetic coil to produce a small electrical signal. The frequency of the signal is based on the rotational speed of the component. The ECU or TCM explains this signal to measure the speed at which different gears of transmission are rotating
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