8l90 transmission problems


  • GM 8L90 Transmission: Specs & Updates
  • Federal Judge Consolidates Class-Action Lawsuits Over GM’s 8-Speed Automatic Transmission
  • Transmission repair manuals 8L90/8L45
  • GM Class Action Lawsuit Filed Over Transmission Problems That May Cause “Shaking, Jerking”
  • GM Transmission Problems
  • Metal Shavings, Premature Wear Found in 8-Speed Transmissions
  • GM 8L90 Transmission: Specs & Updates

    Conclusion Transmission problems could be one of the most expensive issues to sort out and if you are not a step ahead, you will highly likely end up paying thousands of dollars on repairs and you will end up in an endless money pit.

    And trust me, every vehicle has its own problems and nothing is perfect. But some vehicles are more perfect than others. In this article, we are going to learn what is the Silverado and what is the automatic transmissions and how these transmissions work.

    Then we will cover the Chevy Silverado transmission problems in order for you to have a better idea of what you are getting yourself into.

    Then we will answer some questions related to this topic. What Is The Chevy Silverado? The Chevy Silverado is a full-size pickup truck manufactured by Chevrolet. The Silverado was first introduced in and is still in production to this day. At the moment this model is in its fourth iteration. This means that the present generation is number four. And is right behind the Ford F when it comes to sales. These trucks are extremely popular as a first-hand purchase and also on the second-hand market.

    They are practically workhorses that allow many individuals and companies to get work done quickly and effectively. But you should notice that not all of the trucks out there are good and some of them are suffering problems. Some of them have engine issues , some have electrical problems, while some of them have transmission issues. Learn more about the reviews online and previous experiences with this model.

    Because they often cost a lot of money. And one of the most important aspects is to learn the transmission problems. Precisely in this situation, the Chevy Silverado transmission problems. Knowing these problems will save you thousands of dollars in the long run. But you first need to learn more about what is a transmission. And that we are going to cover next.

    The transmission has a primary goal of evenly delivering the torque to the wheels. But what does all this means in the first place? What is torque and from where does it come? When the engine starts it starts spinning the crankshaft. This means that there is rotational energy that is produced by the engine. All this could sound confusing. But in practice, it is quite simple to understand. The transmission is a converter of energy.

    If there is no transmission and the engine is connected directly to the driveshaft, the driveshaft would simply snap into pieces. First, they discovered the manual transmission where the driver goes through the gears manually. And as the years went by they found a way to ease this operation by inventing the automatic transmission.

    But still, there are Chevy Silverado transmission problems because nothing is perfect. But how do these automatic transmissions work? An automatic transmission works by using hydraulic power to go through the gears. So, in one section are the gears and in the other section is the complex plumbing of hydraulic fluid lines. The hydraulic fluid moves through these lines based on the input from the driver. This input as we know is the input from the gas pedal or the gear lever when the driver puts the car into gear or reverse or park.

    The transmission recognizes this input and acts accordingly. There are still some issues with these transmissions.

    This is the case because these transmissions are quite complex pieces of machinery and know to develop a ton of issues. Some transmissions are more plagued by problems than others. Knowing the issues is key when it comes to avoiding possible headaches in the long run. Getting yourself a bulletproof transmission will guarantee that you will not face Chevy Silverado transmission problems in the long run and your ownership will be quite good.

    But first, you need to learn which of the transmissions were used in the Silverado. And we are going to cover the most probable transmissions that you might come across while on the market for a used Silverado. Knowing the transmissions used in the Silverado will help you learn the Chevy Silverado transmission problems.

    So, which are the transmissions? This transmission was used on a ton of other Chevy products as well. There was also the 4L65E which was an upgraded transmission designed for the 6. Which is fairly decent for this time. But more on that later. In the name, the 4 stands for 4 speed while the 80 stands for lbs which was the maximum towing capacity. This transmission was used mostly in the HD models of the Silverado. This transmission was also popular as a truck transmission.

    Since it was quite beefy and could withstand a lot of towing. Because modern Silverados are running these two transmissions. These transmissions are quite beefier and are designed to handle quite more torque than the previous generations of Chevy automatic transmissions.

    More precisely the 6L could handle lb-ft of torque. And these transmissions could be handled both automatically or with paddle shifters. The towing capability of this transmission is 8, lbs and is electronically limited.

    Because it could handle quite more but it will overstress the transmission and the transmission could possibly fail. The 8 speed is transmission was designed with performance in mind. And when it comes to that it delivers quite a lot in comparison with other transmissions that are out there in the market. All shifts are quite snappy and smooth. Making this transmission extra desirable. This transmission was designed to handle a lot of power more precisely hp and lb-ft of torque and has a maximum towing capacity of 13, lbs.

    And more about these problems with the 8L90 transmission we are going to cover next where we will discuss all of the problems that these transmissions have. Chevy Silverado Transmission Problems In this chapter, we are going to cover the four most widely used transmissions on the Chevy Silverado and their problems. These problems have to be known in order for you to have a better idea of what to expect before you get a Silverado with these specific transmissions.

    Also, when you test the trucks you will be able to tell if the transmission has a problem or not. As we said this transmission can be found in the early models of the Silverado from the first and second generations.

    This transmission has a few issues. No Reverse High mileage 4L60E transmissions could have a problem shifting in reverse. This is a common problem on these and if you have one of these issues you are going to notice it.

    The truck simply will not go in the reverse gear. There will also be metal shavings in the oil pan as well. The transmission is experiencing delayed shifts from first to second.

    This is mostly caused by worn or broken transmission bands. This band is a friction material that serves the purpose of engaging the clutch. When this material is worn the clutch simply slips. This problem is also found in higher mileage vehicles. Another reason for this problem could be the broken TPS sensor. Also known as throttle body position sensor. This problem is caused by the accumulator. This is a small shock absorber that is located inside the valve body.

    This plastic piston located inside breaks and the car just jerks into gear. Although a minor issue, it has to be addressed quickly before more damage is created. This produced many shifting problems and check engine lights. Once these sensors were checked and replaced the problem was solved. Slipping Gears Or Failure To Shift Slipping gears were notorious on these transmissions because there were a total of 8 solenoids that were used to control the transmission and the shifting.

    Sometimes these solenoids know to fail and report problems like slipping gears. Replacing the affected solenoid fixes the issue and the transmission resumes proper work. If you notice slipping gears and excessive vibrations. You know that there is a solenoid that went bad. Overheating Transmission overheating is also a common occurrence on the 4L80E. This is the case because when the vehicle is loaded heavily.

    Federal Judge Consolidates Class-Action Lawsuits Over GM’s 8-Speed Automatic Transmission

    This new 8-speed automatic transmission was developed completely in house by General Motors, and is produced at their assembly plant in Toledo, Ohio. The 8L90 transmission features five clutches and four gearsets, housed inside of a one-piece aluminum case with an integrated bell housing and detachable extension for the Corvette transaxle.

    Thanks to clever packaging and lightweight materials, the GM 8L90 actually fits into the same footprint as the gearbox it replaces. The Corvette 8L90 weighs 8 lbs less than the old 6L And the 8L90 performance transmission comes with something called Performance Algorithm Shifting PAS that reads how aggressively the driver is using the throttle, then adapts the shift points for performance oriented driving.

    The 8L90E transmission uses three rotating clutches and two brake clutches. However to lower spin losses and improve efficiency, only two of the crutches are open at a time.

    Further reducing parasitic loss is an industry-first chain driven off axis binary vane-type pump that is located in the valve body, very low in the sump. This unique 8L90 transmission pump also significantly improves priming capability and line pressure. To improve off the line performance for both towing and spirited driving, a wider 7. This allows for a more aggressive 4.

    A new bit Gen II 8L90 transmission controller is mounted outside the transmission, and can complete hundreds of operations every 6. This 8L90 control system monitors clutch pressures and actually tests other internal components to ensure that they are performing properly. It can also compensate for normal wear on clutch plates and other components. Additionally, a fixed yolk design is used in cars with the supercharged 6.

    Transmission repair manuals 8L90/8L45

    Both the automatic and manual transmission on the model are equipped with Active Rev Matching for lightning-fast shifts. Many automotive enthusiasts describe the automatic transmission in the Chevy Corvette as the highest-capacity automatic transmission ever offered in a Chevrolet vehicle.

    The steering wheel paddles allow the driver to downshift and upshift by simply tapping the paddles. The automatic transmission in the Chevy switches gears based on the current driving conditions. However, the manual shifting mode allows the driver to select specific gears on demand. The transmissions in the Chevy Corvette were designed to be an upgrade from the six-speed automatic transmission used in the previous model.

    Unfortunately, its complex design fell short and failed to live up to the quality consumers expected from the brand.

    GM Class Action Lawsuit Filed Over Transmission Problems That May Cause “Shaking, Jerking”

    The Chevy Corvette transmission problems that consumers have been complaining about are mind-boggling. From overheating issues, faulty torque converters, transmission leaks, and software-related problems such complications have been reported in epidemic proportions.

    Some have noted that these sensations are more pronounced when cruise control is engaged. According to GM, this issue is a result of the moisture content in the transmission fluid.

    The manufacturer suggests completely removing the old GM transmission fluid with a transmission flush. In some instances, the transmission will need to be flushed more than once to ensure that there are no traces of the old fluids. After a week you should notice an improvement in shift quality. If the problem persists you may need to install a new torque converter.

    When a transmission starts overheating it damages the internal components within the transmission. The most common reasons for overheating in your Chevy Corvette are: If you are still using the GM transmission fluid chances are this can play a role in your transmission overheating.

    The fluid has to work harder which causes it to overheat and loses its ability to cool down the transmission. Faulty solenoids are quite common in the Chevy Corvette. The solenoids control shifting by regulating the transmission fluid pressure. For most drivers who experience their transmission overheating it resulted in limp dealer mode error code. However, once the vehicle sat for a few hours it resumed to its normal operation until the next overheating cycle. Consumers have reported that it becomes increasingly difficult to switch into first, second, and then third gear.

    The transmission slipping while in gear has also become a problem for several owners. This problem continued to persist after the dealer flushed the transmission three times and used a thicker fluid in the transmission.

    Transmission Leak Transmission leaks in the Chevy Corvette is becoming increasingly common.

    GM Transmission Problems

    A transmission fluid leak is typically a result of the seals used on the transmission deteriorating rather quickly. Replacing the transmission seal can resolve this issue.

    In the service bulletins that General Motors has released, the automaker suggests having a transmission fluid service to replace the original Dexron VI transmission fluid with a fluid with a lower viscosity.

    In recent years, more attention has been placed on fluid complexity due to the fact that modern transmissions have significantly evolved from the hydraulic and mechanical components they used to be.

    Therefore, they require premium quality transmission fluids. These transmission fluids had better chemistry with the materials of the eight-speed automatic transmission. Instead, moisture started to build up inside the transmission.

    They also designed a reinforced version of the machine 8L90E, which was installed even on 8-cylinder engines with a working volume of 6 liters. This transmission was developed specifically for use on premium cars, it was reliable, fully controlled by electronics, providing the most comfortable control of the car.

    Both of these boxes have many similar functions, including a Start-Stop system, which improves the performance of cars. Unlike its American competitor, the American transmission had a greater margin of safety in the iron part, so it could gokilometers before the first overhaul of the automatic transmission 8L45E, 8L90E. This box, like all modern automatic machines, was critical to the quality of the oil, which had to be changed on a regular basis. Most often, it was necessary to restore the torque converter or replace leaky gaskets.

    Metal Shavings, Premature Wear Found in 8-Speed Transmissions

    As a preventive measure, all the bushings were changed, and as for the cars where car owners ignored recommendations for oil replacement, the hydraulic block was also opened, and the valve plate was cleaned. Also, the problems were caused by the oil pump, in which the valve was worn off, after which it was cleaned, the automatic machine in the conditions of such oil starvation quickly wore out, which led to critical malfunctions.

    It was necessary to use only original spare parts to rebuild 8L45E, 8L90E, which allowed restoring the transmission, eliminating even critical breakdowns.


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