Using a floor jack that is recommended for the weight of Make sure to put on protective gloves prior to removing any battery terminals.
Step 3: Install a nine volt battery saver into your cigarette lighter. In this case, place the wheel chocks around the front tires since the rear of the vehicle will be lifted up.Įngage the parking brake to the lock the rear tires from moving. Place wheel chocks around the tires that will remain on the ground. Make sure that the transmission is in park mode (for automatics) or in 1st gear (for manuals). Step 1: Park your vehicle on a flat, hard surface. Look for the transmission speed sensor and see if the harness is attached and secured. When returning from the test drive, grab a flashlight and go under the vehicle. Drive the vehicle around the block to see if the speedometer will operate. Step 1: Turn on the ignition and start the engine. Part 1 of 6: Check the condition of the transmission speed sensor
#How to install transmission driver#
If the magnet comes off the speed sensor, it will lodge itself into the transmission making a grinding noise.ĭepending on how the sensor failed, an engine light will illuminate to inform the driver that there is a problem. If you operate a vehicle and the speedometer does not register anything, or if the speedometer begins to move after the vehicle is in motion, then the transmission speed sensor has failed. The signs of transmission speed sensor failure are: Sometimes, the sensor will fail if it is submerged in a different type of oil than what is recommended due to viscosity. When the magnet get too much metal particles on it or if the magnet loses its magnetism, then the sensor stops working. As the magnet references a measurable resistance to a metal, it sends some voltage to the computer. The block rotates with the shaft and each key passes over the sensor magnet. The output shaft has a key cut design block on the shaft. Some transmission speed sensors are driven by a gear making them like a governor, however, most speed sensors are magnets that change signal when the output shaft is turning. The engine light codes for the transmission speed sensors are:Ī failed transmission speed sensor could cause the engine light to come on. In this case, even if you are driving at the speed limit you will be passing other vehicles. If your vehicle has larger tires than normal, then the road speed will be calculated at a lower speed. This is due to the output shaft spinning faster. If your vehicle has smaller tires than normal, the road speed will be calculated at a higher speed, even though your are going slower. The sensor is very accurate to the standard vehicle equipment from the manufacture. Transmission speed sensors are designed to precisely calculate the road speed through the output shaft of the transmission. Every vehicle we drive needs to have some sort of way to determine the road speed as the vehicle is in motion.