5 Most Common CVT Transmission Problems and Symptoms

CVT transmissions sometimes have problems, and some people have had bad experiences. But many people also drive cars with CVT gearboxes and never have any issues. Some cars with high mileage also don't seem to have problems.

We got even more confused when we looked into this because some people say their CVT transmissions last a long time, like 300,000 kilometers or more. But then some people had their CVT fail before the car even reached 50,000 kilometers.

We did more research, and in this article, we will talk about the common problems of CVT transmissions, what different car brands do with CVTs, and give some recommendations. To learn more about CVT transmissions, you can also check our guide from last week.

1.    Slipping, Grinding, and Jerking

If you think your CVT transmission is not working properly, it's important to figure out what might be wrong. If the transmission is slipping too much, it could mean there are serious issues with the transmission structure or problems with the transmission fluid.

Having too little transmission fluid can lead to a lack of lubrication, which is needed for the constant adjustments of the CVT pulleys and belts or chains. The same can happen if the transmission fluid is old. While a little slipping is normal for CVT transmissions.

When it comes to grinding noises in a CVT transmission, it's a bit of a mystery. Any grinding noise in the CVT gearbox usually means the internal components are worn out. Additionally, changing the transmission fluid might help with the grinding noises.

But often this happens in cars with high mileage, where a transmission replacement might be necessary.

If your CVT transmission is jerking, lurching, or jumping forward, it's a serious concern. This could be due to low transmission fluid, contaminated or old transmission fluid, or a need for reprogramming the CVT.

Some people say that certain CVTs may not be as smooth as others, and a bit of jerking is normal when shifting between "high" and "low" gears. However, others argue that any jerking at low speeds is not normal.

2.    Control Module Problems

Like other automatic transmissions, CVTs have a transmission control module (TCM) that gathers signals from car sensors to regulate transmission behavior. If there's a problem with the TCM, you may experience sudden changes, such as delayed engagement or increased slipping.

Electronic issues show up instantly, unlike gradual structural or mechanical damage to the CVT.

3.    Transmission Fluid Problems

Using old and worn-out transmission fluid is a major problem for CVT transmissions. It's crucial to emphasize this point. Most of the issues we're discussing with CVT transmissions stem from having insufficient, worn-out, or incorrect transmission fluid.

Just like any other transmission, having a proper amount of healthy transmission fluid is essential. It prevents mechanical damage by lubricating moving parts and maintaining a cool temperature.

Regularly check your CVT transmission for leaks and ensure that the transmission fluid is replaced according to the manufacturer's recommended interval. Some owners choose to replace the fluid more frequently, as it has proven to keep the CVT in better condition over time.

4.    Whining, Clunking and Rattling Sounds While Driving

If your CVT transmission makes strange noises, that's a problem. It could be due to using the wrong fluid or needing a fluid change. But sometimes, it's a sign of trouble with internal bearings. A good mechanic will check for other issues like bad wheel bearings, suspension, or brakes first because those are easier and cheaper to fix and can sound similar to transmission problems.

5.    Overheating Problems

All automatic transmissions, including CVT, are very sensitive to overheating. This can happen if you use your car in a way, it's not meant for, like heavy towing. It can also occur if there's not enough transmission fluid, if the fluid is old, or if there's a problem with the oil pump affecting fluid circulation.

Your car's dashboard will warn you if the CVT is overheating. If this happens, stop your car as soon as possible. If overheating is due to traffic conditions, wait for the CVT to cool down before driving again. If the overheating warning keeps coming on, there might be a problem with the CVT, and you should take your car to a service center.

You can also visit Mad Lab Automotive for professional CVT transmission repair if you are from Edmonton.


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