
Japanese domestic cars use CVT. The CVT transmission has a compact size, lower fuel consumption, and fewer internal components. Additionally, its internal mechanism is much simpler, making the CVT continuously variable transmission a preferred solution for many Japanese manufacturers. Below is a detailed introduction to the advantages and disadvantages of CVT transmissions: 1. Advantages: The CVT transmission is compact, simple in structure, easy to maintain, and offers smooth performance. It is primarily used in Japanese cars, Korean cars, and some domestic vehicles. The CVT transmission allows the engine to operate within an optimal RPM range, making cars equipped with this transmission generally more fuel-efficient. 2. Disadvantages: The drawbacks of CVT transmissions include low torque capacity and a tendency to slip. Therefore, CVT transmissions are typically paired with small-displacement engines. Larger displacement engines produce higher torque and are usually matched with AT transmissions.

As an ordinary car owner who frequently drives Japanese cars, I can confidently say that CVTs are very common in domestic Japanese vehicles. Major manufacturers like Toyota, Honda, and Nissan predominantly use CVTs in their small and medium-sized models, such as the well-known Toyota Aqua and Honda Freed, which are popular domestic models. CVTs indeed provide smooth driving and fuel efficiency, especially in urban traffic where they don't jerk like AT transmissions, and they can reduce fuel consumption by about 10% compared to traditional transmissions. However, the downside is that the acceleration feels somewhat sluggish, and there might occasionally be delays during cold starts in winter. I've driven a Nissan Note equipped with a CVT, covering 80,000 kilometers in five years with no issues other than changing the transmission oil. Japanese automakers continue to refine CVTs; for instance, Toyota's newer models have added launch gears, significantly improving low-speed response.

Having worked in a repair shop for over a decade, I've dealt with the most transmission issues in Japanese cars. Conservatively speaking, over 60% of domestic Japanese models use CVT transmissions, especially those with engines below 1.5L displacement. These CVT structures are actually quite sophisticated, but their steel belt drive systems are particularly vulnerable to prolonged high-load conditions. Last year, I serviced a Serena with 150,000 kilometers on it—the steel belt slipped because the owner frequently drove it fully loaded up steep slopes. During repairs, I noticed that newer CVT models now incorporate temperature protection programs that automatically limit speed when overheating. Of course, not all Japanese cars use CVT; high-end MPVs like the Toyota Alphard still rely on AT transmissions, and some Mazda models insist on using their in-house developed 6AT. Regular car owners should remember to change the dedicated transmission fluid every 40,000 kilometers, which can significantly extend the lifespan of a CVT.

As a car enthusiast, I've studied Japanese automakers' transmission strategies. Nowadays, apart from sports cars and special models, CVTs dominate ordinary family cars in Japan. For instance, Toyota's Direct Shift-CVT adds a physical first gear to solve the traditional CVT's weak start issue; Nissan uses higher torque-capacity CVTs in models like the Juke. Interestingly, the performance car segment is completely different - Subaru WRX sticks to 6MT in Japan, while Toyota GR Yaris comes with a 6-speed manual. The biggest advantage of CVTs is about 15% better fuel efficiency than ATs, with smoothness approaching electric vehicles. However, transmission fluid temperature management is crucial, especially for long-distance summer driving where heat dissipation must be monitored.


