What is the lifespan of a CVT transmission?
What is a CVT transmission? A CVT (Continuously Variable Transmission) is a type of automatic transmission with unlimited gear ratios. A traditional automatic transmission has a fixed number of gears (4 for a 4-speed transmission, 6 for a 6-speed transmission, etc.). A CVT can form any number and combination of gears, depending on mechanical limitations and conditions. Programming of the transmission control unit.
Many CVTs are programmed to shift like traditional automatic transmissions, but they never actually have to “shift” at all. The gear change process is seamless and can be performed even under engine load. This results in a very smooth power delivery, almost like an electric vehicle.
The reason some CVTs seem to be changing is because many consumers don’t like the feel or sound of CVTs. CVTs have the ability to keep the engine at the most efficient speed depending on the driver’s demands to achieve maximum torque, power, or fuel efficiency.
When the transmission does this, the engine rotates at a constant speed even as the speed increases. This “rubber band” effect may remind some people of a powerboat or a snowblower.
This is especially true at full throttle. When you apply full throttle, the engine speed quickly rises to about 5,000 rpm and stays there. This is normal behavior for many CVTs and is probably nothing to be concerned about. How does a CVT work? There are many different types of CVTs. One of the most common designs uses a pair of conical pulleys with a belt or chain between them. As each pair of cones moves closer or farther apart, the “gear” of the pulleys changes.
In addition to the variable diameter pulley systems used by other manufacturers, Nissan also makes Toroidal CVTs. Rear-wheel drive sports cars. A toroidal CVT works by moving a pair of rollers that transfer torque between two discs. As the rollers spin, each conical disc spins at a different speed.
Toyota makes a special CVT that has a physical first gear like a traditional automatic transmission and then seamlessly transitions into the CVT after upshifting.
There are several other types of CVTs, including hydrostatic and magnetic (which use fluid and magnets, respectively, to transfer torque), but they are less common in cars and trucks. How long does a CVT transmission last? The lifespan of a CVT depends on many factors. CVTs have been around for a while, but only recently have they become affordable and reliable. CVTs in newer model vehicles can easily last over 100,000 miles with regular maintenance, but older CVTs may not last that long.
Some automakers have moved away from making traditional automatic transmissions and are investing significant resources into CVT technology. In recent years, the quality of CVT transmissions has been fairly consistent, with most manufacturers now able to produce CVT transmissions without major reliability issues.
Are CVT transmissions reliable? Nissan CVT reliability
There is no available data on failure rates in the automotive industry, but you can research the vehicle you are considering buying to see what technical service bulletins (TSBs) and recalls have been issued. This should give you an idea of whether or not there is a risk of a major problem. Customer complaints are also a good anecdotal indicator.
However, most CVTs made in the last 5 years by major automakers are generally pretty reliable and should last a light 100,000 miles. After that, it will vary depending on owner maintenance and build quality.
Mazda still uses traditional automatic and manual transmissions almost exclusively.
Toyota
Toyota is a big company that has perfected lean manufacturing. Their CVTs are some of the most reliable on the market.
Honda
Honda is also known for reliability, and they’ve done an excellent job developing CVTs. The 10th generation Honda Civic with its 1.8-liter turbo engine and CVT has more power than you’d expect. It accelerates pretty much like an electric car.
Subaru
Subaru’s CVT squeezes every last mile out of the fuel tank, which is important for the brand to stay competitive in a market governed by emissions levels.
Many people like to take their Subarus off-road. Keep in mind that CVTs often can’t hold as much torque as a traditional automatic or manual transmission, so they tend to overheat when used beyond their design parameters.
Nissan
Nissan has had a lot of reliability issues with their small car CVTs in the past, so do your research before buying a used Nissan with an automatic. CVT transmission reliability has improved over time, giving the opportunity to improve the design. It is not uncommon for older Nissan CVTs to fail after 80,000 miles.
Mitsubishi
Mitsubishi has struggled over the past decade, but continues to produce some of the least expensive cars on the market. If you are interested in buying a Mitsubishi vehicle, it may be wise to do a little research on CVTs first.
Do CVTs need to be flushed? Most owner’s manuals do not specify flush intervals for CVT transmissions, but claim that the continuously variable transmission fluid (CVTF) will last for the life of the vehicle.
Use common sense to decide whether to flush your transmission or perform other possible maintenance. If your fluid looks or smells old, contains particles, or your vehicle simply has high mileage, you should consider flushing your transmission.