What are the differences between the second-generation and third-generation GM 6AT?

[McLiam]

The differences between the second-generation and third-generation 6AT lie in the interior and exterior design as well as the body dimensions, with the third-generation model featuring a larger body size. Exterior Design: The third-generation Haval 6AT has been upgraded with a larger body size, featuring a more exaggerated exterior design and standard matrix LED headlights. The interior introduces dual floating screens for the first time, providing an unobstructed view of the dashboard and a strong sense of technology. The exterior dimensions measure 4653mm in length, 1886mm in width, and 1730mm in height, compared to the second-generation model's 4600mm, 1860mm, and 1720mm, showing improvements in all three dimensions. Engine: The second-generation model has a wheelbase of 2680mm, while the third-generation model is extended to 2738mm, an increase of 58mm, resulting in a noticeable improvement in interior space. The second-generation and third-generation models use different engines. The second-generation model is equipped with two engine options: a low-power 1.5-liter turbocharged engine and a 2.0-liter turbocharged engine. The third-generation model uses a high-power 1.5-liter turbocharged engine.

[ManuelLee]

As someone who drives frequently, I feel that the second-generation GM 6AT sometimes exhibits jerky shifts during daily driving, especially during low-gear transitions, like when starting or accelerating—the car tends to shudder slightly. However, after trying the third-generation version, the difference is significant—it shifts much more smoothly, with almost no noticeable lag. Additionally, the third generation uses updated software systems to intelligently adjust shift timing, making it more hassle-free in traffic jams, for example. You can experience this by comparing the older and newer models of the Chevrolet Malibu—the newer version also has slightly better fuel efficiency, averaging about 1 liter less per 100 km. Overall, the third generation optimizes the driving experience—if you value comfort and convenience, the upgrade makes driving much more pleasant. Still, it’s important to maintain regular transmission fluid changes, as neglecting this could lead to issues over time.

[DeQuinn]

I've owned several GM vehicles over the years, from older Cadillacs to newer Buicks, and it's clear that the reliability of the second-generation 6AT is inferior to the third generation. Common issues with the second-gen include torque converter failures causing sluggish starts or aging circuit boards leading to imprecise shifting. However, the third generation improved materials and design, such as using more durable seals to reduce oil leakage risks, resulting in more stable performance. When I took my car for repairs, the mechanic mentioned that the third generation has a much lower repair rate and longer maintenance intervals—only needing a check-up every 50,000 kilometers or so. This upgrade is quite substantial. If your budget allows, opting for a model equipped with the third-gen transmission is more worry-free and can even extend your vehicle's lifespan.

[Michelle]

From a mechanical perspective, the third-generation GM 6AT has undergone fundamental improvements over the second generation, featuring a more lightweight structure. The optimized internal gear layout enhances power transmission efficiency and responsiveness, while the upgraded control module reduces energy loss. The driving experience is noticeably smoother during acceleration. These refinements make it particularly suitable for urban driving conditions by minimizing unnecessary power interruptions. Overall, the second generation represents a more basic design, whereas the third generation prioritizes efficiency and durability, making it highly recommended for detail-oriented car owners.