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What does 9AT mean?

1 Answers

DelHayden

07/30/25 4:38am

9AT stands for 9-speed automatic transmission. Here are the advantages and disadvantages of 9AT: 1. Advantages: The biggest advantages are fuel efficiency and faster acceleration. The core structure of the 9AT transmission consists of 4 planetary gear sets and 6 shift elements, which is one more shift element than the 8HP. With more gears, the gear ratio difference between each gear is reduced, and the wide range of reduction ratios allows for lower engine speeds at high speeds, resulting in reduced fuel consumption and stronger acceleration. 2. Disadvantages: Due to the increased number of gears, the 9AT transmission has many more internal components, and the manufacturing and development requirements are higher, leading to correspondingly higher costs. The complexity of the internal components also means there are more potential points of failure. Additionally, the need to fit components into a compact housing size reduces the torque capacity.

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