![]() 3- Whining, clunking and rattling sounds while drivingĪny sort of weird noises coming from the CVT transmission is a sign of trouble. Structural and mechanical damage to the CVT will arise gradually but electronic problems tend to show up instantly. You can determine if the part at fault is your transmission control module when these symptoms show up suddenly and without prior problems. There might be delayed engagement, exaggerated slipping of the gearbox, and all sorts of other symptoms. If there is a fault in the transmission control module of your CVT transmission, you may experience sudden changes in your transmission behavior. ![]() This module gathers all the signals from various sensors in your car and determines how the transmission should react. Just like all other automatic transmissions, the CVT comes with a TCM, a transmission control module. There are many people online and at dealerships claiming that a degree of jerking under low speeds is normal. We have also found accounts where certain CVTs are just not as smooth as others and a degree of jerking is to be expected when the CVT shifts between the “high” and “low” “gears”. In most cases, there are problems with either too low transmission fluid, contaminated and worn out transmission fluid or a reprogramming of the CVT is needed. They did say that the grinding noises might be resolved with a shorter transmission fluid interval, but in most cases, this happens on high mileage vehicles where a transmission replacement is to be expected.Īny kind of CVT transmission jerking, lurching or jumping forward is a serious sign for concern. We talked to a Honda dealership here in Germany and they told us that any kind of grinding in the CVT gearbox is a sign of worn-out internal components. While some slipping of the CVT transmission is normal, you will definitely feel when there is excessive transmission slipping that bothers your regular driving routine.ĬVT transmission grinding noises remain a mystery, there is no definitive answer as to what the problem is when you hear a grinding noise coming from a CVT transmission. The same might happen if the transmission fluid is worn out. If there is not enough transmission fluid, there might be a lack of lubrication that is needed for the constant adjustment of the CVT pulleys and belt or chain. Excessive slipping of the transmission might indicate serious structural transmission issues or problems with the transmission fluid. ![]() If you feel that your CVT transmission is slipping, you are right to take action in diagnosing what the issue is. This guide is just this, a general guide to CVT transmission problems and symptoms, but keep in mind that each of these problems needs professional diagnostics. Certain symptoms can indicate multiple problems. When it comes to CVT transmission problems and symptoms, the problem is that many of them cannot be directly explained. We will break down what the most common CVT Transmission Problems And Symptoms are, how certain car brands do in the CVT department and our recommendations. This lured us into further research which we will present in this article. If you want to learn more about CVT transmission read our guide which we posted last week. For example there were 100s of people (mainly on forums) claiming that their CVT transmissions easily lasted 300,000 kilometers (200,000 miles) and you also stumbled upon forum threads and lawsuits of people that experienced complete CVT failures before their cars reached 50,000 kilometers (30,000 miles). When we did our research for this article, we got even more confused about CVT transmissions than we already were. ![]() And not only with new cars, with high mileage cars as well. The people who have lived through a CVT nightmare can definitely understand why, but on the other hand, there are literally millions of people who drive around with CVT gearboxes without ever having any issues. CVT Transmission Problems: CVT transmissions have a bad reputation.
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