What is the difference between 9AT and 6AT?

2 Answers
VonCamille
07/29/25 11:44pm
The difference between 9AT and 6AT is: the 9AT transmission has more gears, and its transmission efficiency is higher than that of the 6AT transmission, while also offering better fuel economy. More details are as follows: 1. The AT transmission is the most mature and widely used transmission, providing smoother gear shifts and better reliability and stability. 2. The AT transmission relies on planetary gears for speed and torque changes, and it contains many planetary gears inside. There are three common types of automatic transmissions: AT transmission, CVT transmission, and dual-clutch transmission. 3. The dual-clutch transmission is currently a popular transmission type, known for its high transmission efficiency and fast gear shifts. Its structure is similar to that of a manual transmission, with the addition of a gear-shift control mechanism and an extra clutch. One clutch controls the odd-numbered gears, while the other controls the even-numbered gears. 4. The CVT transmission has a different structure compared to conventional transmissions. It consists of two cone pulleys and a steel belt, providing smooth gear shifts and good reliability and stability. The CVT transmission allows the engine to maintain an optimal RPM range, thereby improving the vehicle's fuel efficiency.
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EmiliaAnn
08/16/25 3:00am
I've just researched this issue, the main differences between 9AT and 6AT lie in gear count and actual efficiency. The 9AT has three additional gears with a wider gear ratio range, especially maintaining lower RPM during highway cruising. Like when I drove an SUV equipped with 9AT before, it only ran at around 1500 RPM at 100 km/h, being quiet and fuel-efficient. However, during frequent start-stop in city traffic, gear shifts at lower speeds might cause slight jerks. The 6AT has a relatively simpler structure with lower maintenance costs - my mechanic friend said Honda's 6AT in older CRV models could last over ten years without issues. Regarding fuel consumption, 9AT shows clear advantages, especially saving about 15% fuel on long trips, making it more economical in the long run. For modification potential, 6AT adapts better to ECU tuning programs, suiting car enthusiasts. The choice depends on your regular driving conditions and budget.
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