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There can be many causes when your car’s transmission not shifting accurately. Inadequacy of fluid, burnt clutches, or any of the oodles of parts make up your car’s transmission. How do you know where to get going? Most automatic transmission shops will execute a brief audit, in which they look to make sure that your standard transmission is full of fluid and that the fluid is not burnt.
If the fluid looks trustworthy they will tell you that they need to tear out the automatic transmission to inspect inside to see exactly what has gone bad on the interior of your car’s automatic transmission.
This happens hundreds of times each day around the country. The trouble is, it is not the accurate next step.
A suitably performed computer diagnostic will often lead to the perfect answer, which is an astray automatic transmission sensor. Because today’s up-to-date transmissions are electronic as well as hydraulic, they use commands given from the vehicles computer to the transmissions sensors to let the transmission know, at exactly what velocity to carry out a shift. One of the standard transmission sensors that mainly fails, is the passenger car speed sensor.
Most newer Wheels Speed Sensors are of the permanent magnet brand, and work much the same as a camshaft or crankshaft sensor. The sensors can be framed either in the manual transmission case or rear differential assembly. Those in the automatic transmission are frequently gear driven, and those in the differential perform by using a trigger wheel framed with the ring gear.
Both style sensors behave the same task. Driveability symptoms brought about by a defective sensor can vary greatly due to the number of tasks the sensor output is involved in. Most automobile computers will set related maintenance engine light codes for auto speed sensors that malfunction. But what if there are no codes? What should we look for?
First, see if there are multiple systems with concerns that can be related to a damaged speed sensor. For instance, if our automatic transmission is shifting below par and your speedometer is not working, then you may have a speed sensor crunch. So how do we checkup for a suspect VSS? If you have a scan tool available then pull up the VSS value and check out for weird or bad readings.
Follow up with component and wiring tests as needed. First find a resistance value for a new sensor, and survey for complete resistance across the sensor terminals. Also, survey for metal contamination on the magnetic pick-up and inspect trigger wheel or drive gears for breakage. Due to the locations of multitude connectors, water intrusion can also be an quandary, so survey connectors carefully. Remember, even if a scan tool reading shows a wrong speed sensor evidence, you will still need to examine 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 Manual transmission VSS for computer input. So always be sure you are testing the correct sensor! Performing all of these tests can be confusing, but not taking the time to do them can cost you big!
Take your van to your nearest Auto Service Experts for free transmission diagnostic and let us check all of your standard transmission sensors before you waste cash on manual transmission overhaul.