Which has a longer lifespan, CVT or 8AT?

[MacIsaac]

8AT transmissions are more mature in technology, with overall stability and lifespan superior to CVT transmissions. Here are the relevant details: 1. AT Transmission: Also known as automatic transmission. The advantages of this transmission include relatively stable technology, while the main drawbacks are higher costs and greater development challenges. However, as the most mature technology among automatic transmissions, AT transmissions still have broad development potential in the future. 2. CVT Transmission: Stands for continuously variable transmission. Its biggest advantage is high smoothness, with almost no noticeable jerking. The main drawbacks are limited torque and inconvenient maintenance. 3. Comparison: Overall, AT transmissions offer strong reliability and can handle high-displacement and high-torque engines. However, they fall short in terms of smoothness and fuel economy, and require frequent system upgrades, leading to higher maintenance costs. In contrast, CVT transmissions are more economical and excel in smooth gear shifting—CVT is second to none in this regard. However, this type of transmission is mostly used in small-displacement vehicles and is not as widely adopted as AT transmissions.

[Matilda]

I've been in the automotive industry for many years and have driven various car models, noticing a significant difference in lifespan between CVT and 8AT transmissions. The CVT's stepless transmission structure uses a steel belt and pulleys, which tend to wear out over time, especially with frequent starts and stops in city driving, making it prone to issues earlier than the 8AT. I once drove a Japanese CVT car that started slipping at just 80,000 kilometers, while a German 8AT car with its more robust gear structure remained solid even after 150,000 kilometers. Overall, the 8AT is more durable, but maintenance is crucial—regular oil changes can extend its lifespan. Otherwise, both can fail prematurely, which is a matter of driving safety.

[KalebLee]

When it comes to car repairs, we often see more CVT failures compared to 8AT. The CVT has a simpler structure, but its steel belt and pulleys are less durable, especially during hot summer days when they're prone to overheating and breaking. I once repaired a CVT car whose owner loved to stomp on the accelerator, and the steel belt needed replacement at just 60,000 kilometers. What about the 8AT? Although the gear transmission is a bit more complex, its design is mature, and even if a gear fails, it's easier to repair. Generally, it can run up to 100,000 kilometers without issues. My personal advice is, if you frequently drive long distances or on rough roads, the 8AT is more reliable—it lasts longer and is less troublesome. Maintenance shouldn't be neglected, and CVTs require more frequent changes of their specialized fluid.

[DonovanMarie]

From a technical perspective, CVT achieves continuously variable transmission through steel belts and pulleys, which are prone to material fatigue, with a typical lifespan of 100,000-120,000 kilometers. The 8AT is an 8-speed gear transmission with more robust and wear-resistant gears, generally lasting over 150,000 kilometers. Influencing factors include driving habits, as urban congested road conditions accelerate CVT wear. Proper maintenance can extend lifespan, such as regular fluid checks. Overall, the 8AT has a longer lifespan.