How many speed sensors are on a Chrysler 300?
In any case, you should be wearing eye protection whenever you're underneath, to protect you from getting transmission fluid or rust or whatever in your eyes. Once you're under the car - upside down - locate the two speed sensors. via
Can a transmission speed sensor be cleaned?
In this case, the sensor may not have to be replaced as the sensor can be cleaned off. Yet, only a mechanic should make that determination because there may be damage to the electrical part of the sensor. Normally, the transmission speed sensor is diagnosed with a scan tool which is read by a mechanic. via
Can I drive with a broken wheel speed sensor?
However, when it comes to wheel speed sensors, a minor-seeming glitch may turn into a major safety risk. That is why in general, it is unsafe to drive a vehicle with a broken wheel speed sensor. via