![]() ![]() ![]() That data, along with data from other sensors around the car, is used to set shift points, adjust engine calibrations, and even manage cruise control. These sensors work in tandem to send the powertrain control module (i.e., the computer that manages the engine and transmission) the speed difference between the engine crankshaft and the transmission output shaft, and thus, the gear ratio. Most modern cars have two transmission speed sensors, one at the input shaft and another at the output shaft. Your car’s transmission speed sensors are vital to its powertrain operation. So your car’s transmission is acting up or throwing a heart-stopping fault code and you want to find out if the speed sensors are causing it? Fabulous. ![]() The Drive and its partners may earn a commission if you purchase a product through one of our links. ![]()
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