The Ins and Outs of Buying a Gear Position Sensor
A gear position sensor is a car part that monitors your shift rail's position inside your vehicle's gearbox. It was developed to observe, supervise, and inspect the position of the shift rail (detecting selection of up to five gears) through a combination of two or three sensors like it in each transmission. Many modern automobiles include these sensors that send info that's important to the overall operation of your control modules. Changing gearshift variables will affect your gear position sensor (also known as GPS but not to be confused with the Global Positioning System).
Types of Gear Position Sensor
- Rotary Potentiometers: There are many types of gear position sensor to choose from, and it includes RP or rotary potentiometers that are designed for the most demanding of measurement and control systems. If your GPS is an RP, then it's most likely used for motorsport vehicles to handle gearbox and throttle control, your chassis monitoring systems, and steering angle measurement. Rotary potentiometers are available with a variety of mounting options and electrical angles.
- Linear Potentiometers: As for the linear potentiometer, it's a type of gear position sensor that's known for its low level of noise when it works because it's designed for suspension measurement for data acquisition systems in motorsport. It's a durable GPS type that has a lengthy operating life despite dealing with high G-force conditions and severe vibration from dealing with the gears of racing-level automobiles.
- Contactless Linear Sensors: As for contactless linear position sensors, they're the type of gear position sensors that are based on measurement technology of the hall-voltage or magnetic field variety. There are single, dual, triple, and quadruple output designs for this product. It also has certain advantages over other sensor types, such as higher operating temperatures, overall sensor accuracy, and improved output signal linearization over a given measurement range.
- Contactless Rotary Sensors: The contactless rotary sensor is also based on hall-voltage or magnetic field variety of measurement technology. It's different from contactless linear sensors because of it shape, the type of mount (flange mount), its lightweight features, and its ability to operate in tight and limited spaces while still offering all the advantages of the lengthier and spacious contactless linear sensors (such as its single, dual, triple, and quadruple output designs).
- A Transmission Position Sensor in a Nutshell: A typical GPS is a unit that keeps tabs on the position of a U-shaped target activator and is machined into the top of the gearshift arm. As you change gears, the sensor provides outputs on the shift arm's position through a PWM or analog voltage signal.
Other Things You Should Notice
If one or several of your gear position sensors fail, it could cause your car to not start or make transmission shifting quite difficult in more ways than one. You'll see the check engine light blink when your sensor isn't working anymore and requires replacement. You might have to buy a new GPS if the engine fails to crank over, the check light is on, and there's an incorrect reading of the gear shift indicator.