The transfer case is responsible for allowing four-wheel drive (4WD) vehicles to have different modes that change their drive wheels and transmission characteristics. 4WD vehicles have different modes to adapt to the different terrains over which they are driven.
For example, 4WD low is for traversing steep gradients or towing at low speeds, while 4WD high mode is great for driving on slippery or muddy roads. A critical component for any transfer case is the transfer case position sensor or transfer case range sensor.
What Is a Transfer Case Position Sensor?
The transfer case position sensor is a component that communicates the transfer case’s current position to the vehicle’s computer. This information is critical because the vehicle’s computer needs information on the transfer case’s selected gear.
The transfer case, in addition to providing torque to the driveshaft leading to the front final drive, also contains a planetary gearset that provides the entire driveline with a very low gear when extra power is needed in 4-wheel-drive situations.
For the two gearboxes to function properly, the computer needs to know whether the transfer case is set to 4WD high or 4WD low. On vehicles that are shifted manually rather than with a computer, the 4WD low switch simply illuminates a light on the instrument cluster and tells the PCM 4 wheel low is engaged for proper shift speed decisions.
The sensor typically has electrical contacts that correspond to different transfer case positions. When the driver picks a specific transfer case mode, the switch detects the transfer case’s position and sends a signal to the vehicle’s computer.
A faulty transfer case position sensor might prevent you from switching between 4WD modes.
Tips on Replacing the Transfer Case Range Position Sensor
Locate the Transfer Case Range Position Sensor
The transfer case is mounted on the back of the transmission. The best thing you can do is do research to determine where the switch is located on your vehicle before you ever get under it. The procedure to remove and reinstall the sensor varies from one vehicle to another.
Carefully Removing the Transfer Case Position Sensor
On some vehicles, you’ll need a wrench or ratchet to remove the transfer case position sensor from the transfer case. The sensor is bolted securely, so you’ll need a lot of torque to pry the sensor from its mounting point. This can be challenging since the transfer case position sensor is mounted near other components, making it difficult to access. You might need to use a long wrench or another tool like a pry bar to unhinge the sensor.
On other vehicles, the transfer case position sensor is easily accessible and can be removed using screws. Remember that the sensor is connected to a wiring harness. You should disconnect the sensor before unscrewing the sensor from its mounting point. If the sensor is located in a tight space, you need to be patient when unscrewing the sensor. The last thing you want is to bump your hand and get hurt.
Check the Transfer Case Wiring
The transfer case position sensor’s wires that lead to the computer are located outside the transfer case. Regular exposure to the elements can damage the wires, so sometimes the transfer case position sensor’s wiring is to blame.
Installing a New Transfer Case Position Sensor
Reinstalling the new transfer case position sensor can be challenging if your sensor is located in a tight space. That said, installing a new transfer case position sensor is as simple as installing the new one in the same slot. On some vehicles, you’ll observe that the transfer case has a slot that specifically matches a notch on the sensor. You’ll need to ensure these two faces are joined properly before screwing the new sensor onto the transfer case.
For your vehicle’s 4WD modes to work properly, your vehicle’s transfer case position sensor needs to function. Diagnosing transfer case position sensor issues can be challenging, especially for a DIY mechanic. If you think a vehicle’s 4WD system is malfunctioning because of a suspected failed transfer case position sensor, you shouldn’t be afraid to give the task to an experienced mechanic.
Where to Get a Transfer Case Range Sensor for Your Vehicle
As mentioned, a faulty transfer case position sensor could prevent you from switching between 4WD modes. As such, replacement is crucial if your current one is failing. Thankfully, CarParts.com has you covered with a selection of high-quality transfer case range sensors!
Our transfer case range sensors are carefully handpicked by industry professionals, so you can rest assured that you’re getting nothing but the best from us.
Start shopping by filling out our vehicle selector to narrow down the catalog to compatible transfer case range sensors. You can also use the search filters to find a sensor according to your preferred brand, price range, quantity, and more.
Enjoy the best deals when you shop from us. All our products come with a low-price and lifetime replacement guarantee, helping you get the best value for your money. Order now, and we’ll deliver your new transfer case range sensor straight to your doorstep in as fast as two business days.
Check out our transfer case range sensors today!
Keep Reading: Related Posts
Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.
