After that, it varies depending on owner maintenance and build quality. That said, most CVTs produced by major automakers in the last 5 years or so are generally pretty reliable and should easily last 100,000 miles. Customer complaints are also a good anecdotal indicator. This should give you an idea if you should expect any major problems. While data on failure rates isn’t readily available in the automotive industry, it’s possible to do some research on any vehicle you’re interested in buying to see what technical service bulletins (TSBs) and recalls have been posted. Regular maintenance should be performed according to the owner’s manual. Over the past few years, CVT quality has stabilized quite a bit, allowing most manufacturers to produce them confidently without large scale reliability issues.Ī good CVT will last a very long time when taken care of. Some auto manufacturers no longer produce a conventional automatic transmission and have invested significant resources into CVT technology. A CVT in a late model vehicle should easily surpass 100,000 miles with regular maintenance but older CVTs may not last as long. CVTs have been around for a while, but only recently have they become affordable and reliable. The longevity of a CVT is dependent on many factors. Here’s a good video showing how a CVT works: There are a couple other types of CVTs such as hydrostatic and magnetic (that use fluids and magnets to transfer torque respectively), but these are less common in cars and trucks. This transmission is used on the Corolla Hatchback. Toyota produces a special CVT that has a physical first gear like a conventional automatic, then transitions seamlessly to a CVT after one upshift.
As the rollers rotate, they spin each conical disk at different speeds. This design is better for high torque applications, such as rear wheel drive sports cars.Ī toroidal CVT works by moving a pair of rollers that transmit torque between two disks. In addition to the variable diameter pulley system used by other manufacturers, Nissan also manufactures a toroidal CVT. As each pair of cones moves closer together or farther apart, the “gear” of that pulley changes. One of the most common designs uses a pair of conical pulleys and a belt or chain between them.
There are several different types of CVTs. This is normal operation for many CVTs and likely not a cause for concern. When you floor it, engine speed will jump up rapidly to about 5,000 RPM and stay there.
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This is especially true at full throttle.
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If you’re used to a manual transmission, a CVT may feel like a slipping clutch when you first hit the gas. This “rubber band” effect reminds some people of a motorboat or a snow machine. When the transmission does this, the engine will drone at a constant RPM even as speed increases. CVTs have the ability to hold the engine at its most efficient RPM for maximum torque, power, or fuel economy, depending on what is requested by the driver. The reason some CVTs appear to shift is because many consumers don’t like the way a CVT feels or sounds. This gives the car a very smooth power delivery, almost like an electric vehicle. The process of changing ratios is seamless and can be done under engine load. Though many CVTs are programmed to shift like a conventional automatic, they actually don’t need to “shift” at all. While a conventional automatic has a fixed number of gears (4 gears for a four speed, 6 gears for a six speed, etc), a CVT can form any number and combination of gears based on its mechanical limits and the transmission control unit’s programming. A CVT (continuously variable transmission) is a type of automatic transmission that has an indefinite number of gear ratios.
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