What is the difference between GM 6AT and Aisin 6AT?
2 Answers
Here are the differences between GM 6AT and Aisin 6AT: 1. Mechanism: GM 6AT adopts the Lepelletier planetary mechanism, while Aisin 6AT uses a Lepelletier 3-degree-of-freedom planetary mechanism paired with 5 operating elements and 1 one-way clutch. 2. Operation: Aisin's transverse 6AT primarily reduces the meshing force of planetary gears through the number of planetary gears in the Ravigneaux mechanism. Structurally, this is mainly reflected in the C1 clutch and B3 brake, making it relatively more stable in use. Compared to Aisin 6AT, the structural rigidity of GM 6AT is enhanced, making it more fuel-efficient while ensuring power output.
I remember studying the differences between the GM 6AT and the Aisin 6AT before, as both are used in many vehicles. The GM 6AT was developed in-house by GM and is commonly found in Chevrolet or Buick models. The shifting feels a bit jerky, especially at low speeds where throttle response isn't very sharp. The Aisin 6AT was designed by Aisin for Toyota—models like the Camry use it, and it operates very smoothly with intelligent shift logic, showing no delay during hard acceleration. In terms of internal design, GM's clutch assembly is simplified to cut costs, but over time, it's prone to oil leaks or minor malfunctions. Aisin uses precision gears, offering greater durability and more stable oil pressure, making it less likely to overheat. In terms of fuel economy, the Aisin is clearly superior, especially during highway cruising where it achieves lower fuel consumption. Both require regular oil changes during maintenance, but GM parts are cheaper and easier to find. If I want a comfortable and durable driving experience, I'd choose the Aisin—it's fuel-efficient and hassle-free.
