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Standard transmission Sensor Problems and how they affect your Transmission's Operation

Page history last edited by transmission12 9 years, 8 months ago


There can be many causes when your car’s automatic transmission not shifting suitably.  Deficiency of fluid, burnt clutches, or any of the thousands of parts make up your car’s standard transmission.  How do you know where to begin?  Most manual transmission shops will do an expeditious investigation, in which they look to make sure that your automatic transmission is full of fluid and that the fluid is not burnt.  

If the fluid looks excellent they will tell you that they need to extract the standard transmission to examine visually inside to see exactly what has gone astray on the inner of your car’s manual transmission.  
This happens hundreds of times each day around the region.  The issue is, it is not the perfect next step.  A correctly performed computer diagnostic will often lead to the flawless answer, which is a defective manual transmission sensor.  Because today’s newfangled transmissions are electronic as well as hydraulic, they use commands given from the vehicles computer to the transmissions sensors to let the automatic transmission know, at exactly what rate of motion to execute a shift.  

One of the transmission sensors that generally fails, is the wheels rate of motion sensor.  Most newer Automobile Speed Sensors are of the permanent magnet classification, and perform much the same as a camshaft or crankshaft sensor. The sensors can be mounted either in the manual transmission case or rear differential assembly. Those in the automatic transmission are most often gear driven, and those in the differential behave by using a trigger wheel mounted with the ring gear. Both style sensors take care of business the same task. Driveability symptoms induced by a damaged sensor can vary greatly due to the number of tasks the sensor output is involved in.

Most car computers will set related maintenance motor light codes for car speed sensors that malfunction. But what if there are no codes? What should we peer for? First, see if there are multiple systems with concerns that can be related to a defective speed sensor. For instance, if our standard transmission is shifting sickly and your speedometer is not working, then you may have a speed sensor difficulty. So how do we audit for a suspect VSS? If you have a scan tool available then pull up the VSS value and go over for unpredictable or out of order readings.

Follow up with component and wiring tests as needed. First find a resistance value for a new sensor, and inspect for accurate resistance across the sensor terminals. Also, check for metal contamination on the magnetic pick-up and inspect trigger wheel or drive gears for breakage. Due to the locations of plenty connectors, water intrusion can also be an problem, so examine connectors carefully. Remember, even if a scan tool reading shows a bad speed sensor indication, you will still need to go over wiring and connectors before condemning the VSS.

Also keep in mind that some vehicles have multiple, dedicated speed sensors, such as ABS Wheel speed Sensors and Standard transmission VSS for computer input. So always be sure you are trying out the complete sensor!  Performing all of these tests can be confusing, but not taking the time to do them can cost you big!  Take your jeep to your nearest Auto Service Experts for free automatic transmission diagnostic and let us checkup all of your manual transmission sensors before you waste capital on manual transmission refurbish.


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