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Speed sensor either refers to the ABS system in the brakes or the sensor that connects to the transmission. Assuming you are talking about the transmission I will focus on that. Depending on the year of you car depends on how far it got away from mechanical/analog controls and evolved into digital/computerized controls. This did not happen over night & some older tech is still used. So what does this have to do with your question? Plenty. Older controls worked on vacuum advances, bimetal expansion, mini cams and heat activated devices to trim the power curve & idle of your engine. Now it's sensors, sensors and more sensors fed into a computer looking for values that correlate to built in data base to define which controls do what. All of this effects how much fuel your sparkplugs have to work with and how early or late the spark fires on this fuel to give you more or less power. Thus, if these sensors become worn, slow or defective your car will not work well.
The speed sensor or crank sensor as called by other vehicles is on the rear pass side. Follow a black wire that looks like a spark plug wire. It has a connector and 1 bolt where it attaches near trans. Well known for failing and no spark.
not likely, the speed sensor sends the info to the pcm and will affect gear change, though its highly unlikely that the speed sensor can make the pcm "read" first or second gear, speed sensor sends info to the pcm to help it decide when to shift gears/apply abs/ etc
I think we'll need a little more information. Are you looking for the neutral start sensor switch? Or maybe vehicle speed sensors? Is this an automatic? AWD? Why do you need to change this nonspecific part....is there some trouble code?
The speed sensors are on each front spindle. If you look under the van at the drive shafts, By the tire you will see a gear. the speed sensors are really close to this gear(exciter ring). It is the only thing that has wires going to them by the tire
SOUND LIKE VECHICLE SPEED SENSOR.CHECK THE ELECTRICAL CONNECTOR MAKE SURE ITS INTACT NOT LOOSE OR DAMAGED.ALSO MAKE SURE VECHICLE SPEED SENSOR IS NOT LOOSE OR MISSING MOUNTING BOLT.IF ALL LOOKS GOOD.THE VECHICLE SPEED SENSOR IS BAD.
Which sensor? The solenoid pack is located on the front, under a black rubber cover, right under where the cooler lines go it. But this is only on the 4 speed Trans. If you have a three speed trans, there is no solenoid pack on the outside. Also the 3 speed does not have an input shaft or output shaft speed sensor, only a vehicle speed sensor.