It is said that Aisin 6AT is the largest gearbox in the world. Why Nissan and Toyota never use it?

6AT is very smooth, and basically does not feel frustrated. Although the fuel consumption is a little higher than CVT, it is the most durable gearbox. In the garage, a master told me that Aisin gearbox covers 4-speed, 5-speed, 6-speed and 8-speed. Some low-end cars match Aisin's 4-speed, such as GM, Ford, Citroen, Volvo and BMW are also using 6-speed, and high-end models such as Highlander and Volvo use 8-speed. Among many gearboxes, the master said that Aisin 6AT is the least maintained. Even if it is repaired, it will take several kilometers for the vehicle to have problems.

In fact, no matter how good Aisin 6AT is, it still depends on the adjustment and matching of various manufacturers, such as Mazda's 6AT, which makes you speechless. Why do so many manufacturers around the world choose Aisin gearbox, but Nissan and Honda never buy it?

Yes, Nissan and Honda don't use Aisin gearbox. There is a simple reason. Aisin owns shares in Toyota. It is said that the chairman of Aisin is called Toyota, which can be said to be a subsidiary of Toyota. Do you think Honda and Nissan can use it? It's like McDonald's and KFC. Competitors, rivals, Nissan and Honda will be controlled by others if they choose Aisin gearbox. The cost of building a car is definitely not as good as that of Toyota. How do they compete? Therefore, these two companies will not choose Aisin gearbox.

Honda is actually a technical control, not to mention the gearbox, and even the engine is developed by itself. Honda began to develop AT gearbox in 1964, and Honda has its own AT gearbox in 1968. However, almost all patents of AT gearbox are controlled by American Borgwarner. The AT gearbox developed by Honda successfully bypassed the technical blockade of Borgwarner, and there are dual clutches of AT, CVT and DCT. We only see the radicalism of Honda, and behind the radicalism is the game between Honda and local enterprises and even world-renowned enterprises. This process is quite hard and of course exciting. Here, I am not trying to flatter Japanese cars, but to be realistic.

Finally, Nissan, Nissan originally used Aisin gearbox. Of course, at that time, Toyota didn't expect Nissan to become bigger and stronger, and one day it would become its own competitor. While using Aisin, Nissan also began to join the research and development of AT gearbox. 1970, Nissan, Mazda and Ford jointly established Japan automatic transmission co., ltd., which is what we call Gatco. In the end, Gatco became one of the three largest manufacturers of automatic transmission in the world, and Nissan certainly would not use Aisin.