Is a gearbox really about more gears? 10AT must be better than 6AT?

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Is a gearbox really about more gears? 10AT must be better than 6AT?

Many people think that the more gear the better the car? For example: 6AT is not as good as 8AT, 8AT is not as good as 10AT... As we all know, the 6AT gearbox has been favored by the market.

However, in recent years, 9AT gearbox and 10AT gearbox have also become popular, and many car companies often use multi-gear gearbox as a selling point to attract consumers. However, does a gearbox with a large number of gears equal premium? Will the experience be better?

What are the advantages of a multi-gear transmission?

If the gearbox has fewer gears, it is easier to generate shift frustration when the gear is switched due to the large engine speed drop. However, in the case of a gearbox with more gears, under the condition of consistent adjustment ability, due to the more dense tooth ratio, the speed difference and speed difference between gears and gears are smaller, and the shift is smoother.

Simply put, the more gear the gearbox, the smaller the gap between the tooth ratios, which can make the vehicle more smooth when changing gear.

In addition, the more gear the wider the tooth ratio, so that the engine can maintain a lower speed at high speed, so as to achieve the purpose of fuel saving. Of course, it is not necessarily the more the number of gears of the automatic transmission, the more fuel efficient, such as transmission efficiency, vehicle wind resistance coefficient, engine technology and other hardware factors will affect the fuel consumption performance.

Why do many people think

The more gears, the better?

The reason why many people think that the more transmission gears, the better, may be because many cars equipped with 8AT or 9AT transmissions are all from luxury brands or some high-end models.

In the eyes of many consumers, more gear also means more advanced. Compared to the 4AT gearbox, the 6AT gearbox, the 10AT gearbox does not sound better?

Multi-gear transmission

It's not perfect!

On the surface, more gear can reduce fuel consumption by lowering the engine speed, but as the gearbox gears become more, the volume and weight of the gearbox also increase. Moreover, because the multi-gear transmission structure is more complex, the failure rate will be relatively high.

But in fact, even if some vehicles are equipped with 20AT gearbox, if the match is not good, it is useless! To put it simply, even if it is equipped with an 8AT gearbox, if the gearbox adjustment and matching are a mess, its performance may not be as good as the ordinary 4AT gearbox, and even the fuel consumption will be unusually high!

There are advantages and disadvantages to having more transmission gears. For some small-displacement cars, the engine has less torque at low speed, and it does need a multi-gear gearbox to help better distribute power and achieve the best power performance. But for most family cars, the 6AT transmission is enough to adapt to various power needs.

In the face of multi-gear transmission, we should also feel the shift logic and shift enthusiasm of the gearbox through test driving. For example, urban users can test the transmission by simulating the driving logic of congested road conditions to see if it matches the driving logic of consumers. If the gearbox is smart enough, more gear is a good thing, but if the gearbox shift response is slow and the logic is confused, I advise you to change the model and consider it again.

No matter what transmission is selected, timely replacement of transmission oil can make the transmission shift more smoothly, and special attention should be paid to the replacement of transmission oil. Due to the different components in various transmissions, the required oil flow rate, density, friction and expansion coefficient are different.

If the wrong transmission oil is added, it will not only cause wear and tear to the electronic components and metal components in the transmission box, but also cause damage to the gearbox seal.

In addition, because different transmissions are only equipped with one transmission oil, and each transmission oil will have a different label, so when it is necessary to replace transmission oil, it must be changed in strict accordance with the variety and label said in the manual, and it is recommended to replace it every 2 years or 40,000-60,000 kilometers.