The Hydra-Matic 8L90 (production code M5U) is a fuel-saving and electronically controlled eight-speed automatic transmission developed and produced by General Motors for use in rear- and rear-biased ...

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. Your car’s transmission speed sensors are vital ...

Most modern vehicles come with two transmission speed sensors, which are responsible for monitoring the input and output shaft speeds of the transmission. These sensors send information to your car's ...