When the automatic transmission is in P gear, how does the ATF oil inside the transmission work? Are

The gear is not rotating, the torsion converter part at the front of the gearbox has been separated, the torsion shell is rotating, and the pressure plate with friction plates inside is pulled back and separated, and the power is not transmitted.

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Although the torque converter can transmit and increase the engine torque, the torque conversion ratio is not large, and the transmission range is not wide, which is far from meeting the needs of the automobile working conditions. In order to further increase the torque, expand its transmission range, and improve the adaptability of the car, an auxiliary transmission is installed behind the torque converter, and the planetary gear mechanism is mostly used.

The planetary gear transmission is composed of a planetary gear mechanism and actuators such as clutches, brakes and one-way clutches. A planetary gear mechanism usually consists of multiple planetary rows. The number of planets is related to the number of gears.

The shift actuators of planetary transmissions include shift clutches, shift brakes, and one-way discs.

Extended Materials. The manual gearbox is mainly composed of gears and shafts, and the variable speed and torque are generated through different gear combinations; The automatic transmission AT is composed of a hydraulic torque converter, planetary gears and a hydraulic control system, which achieves variable torque through hydraulic transmission and gear combination.

Among them, the hydraulic torque converter is the most characteristic component of the AT, which is composed of pump wheels, turbines and guide wheels, etc., which directly input the engine power to transmit torque and separation.

The pump wheel and the turbine wheel are a pair of working combinations, they are like two fans placed opposite each other, the wind from one active fan will drive the blades of the other passive fan to rotate, and the flowing air - wind becomes the medium of kinetic energy transfer.

If the liquid is used instead of air as the medium to transfer kinetic energy, the pump wheel will drive the turbine to rotate through the liquid, and then add a guide wheel between the pump wheel and the turbine to improve the transfer efficiency of the liquid. Due to the torque converter automatic variable speed torque range is not large enough and the efficiency is low.

Can be added to rest assured that it belongs to gear oil You buy gear oil Gear oil can be added to the rear bag of the gearbox As long as it is not engine oil, it is no problem.

If your car is a regular manual transmission, you must use 85w90 gear oil!

It is best to change it, ATF oil is a special lubricating oil, and the general gear oil can only be added to the manual transmission. If you add it incorrectly, it may cause the oil passage in the automatic transmission to be blocked or some valve bodies to be damaged.

Manual transmission plus gear oil, automatic transmission plus automatic transmission oil.

Probably not, the construction principle is different.

Manual transmission oil: Manual transmission oil is usually called gear oil, and its role is only lubrication. The American Petroleum Institute divides vehicle gear oil into six categories: GL-1, GL-2, GL-3, GL-4, GL-5 and GL-6 according to its performance.

Among them, GL-1, GL-2, and GL-3, which focus on heavy loads, have been eliminated on the market, and the current family cars are generally used as GL-4 and GL-5 (GL-6 is used by passenger cars). In terms of oil characteristics, the most intuitive is that the viscosity of manual transmission oil is larger than that of automatic transmission oil, and the replacement cycle is generally shorter than that of automatic transmission oil, and most family cars change manual transmission oil at 4-60,000 kilometers.

AT transmission oil: automatic transmission oil is dedicated, it has two functions, in addition to lubricating and dissipating heat from the planetary gear set, and more importantly, it is to transmit power, so its viscosity is not as "thick" as manual transmission oil. And its main function is to play a hydraulic transmission, so the fluidity is very good, and the ability to resist air bubbles is also more stringent than that of manual transmission oil.

Different types of automatic transmission fluids cannot be mixed, because different types of automatic transmission fluids have different flow rates, densities, dynamic and static friction properties, and expansion coefficients. Some manufacturers are based on the characteristics of the AT transmission to launch a matching transmission oil, it is recommended that the owner or in the 4S shop to replace or buy the corresponding model for replacement, do not replace other models by themselves.

CVT transmission oil: The essence of CVT transmission oil is similar to AT oil, but it is also a special oil, because CVT transmission is a special steel chain drive, which requires different parameters such as oil flow rate, friction performance, expansion coefficient, etc., so it cannot be replaced by AT transmission oil. Relatively speaking, it is thinner than AT transmission oil, and it also has a certain amount of damping friction to prevent the transmission chain from slipping.

Regarding the lubricating oil of the three mainstream gearboxes, they must not be replaced and mixed with each other! AT transmission fluid and CVT transmission fluid with similar oil products can not be substituted for each other, if they are really replaced, although there is no impact on the short-term time, but there is an irreversible impact on the wear and tear of the machinery for a long time.

Automatic transmissions are a common device in modern automobiles, which can automatically adjust the relationship between engine speed and vehicle speed, making driving smoother and easier. However, in order for the transmission to function properly, we need to choose the right lubricant for it.

First of all, we need to be clear that an AT automatic transmission is not the same as a MT manual or a forward-acting transmission, it needs to use a specialized automatic transmission oil to keep it running. This oil not only lubricates and cools, but also provides friction and sealants to keep the transmission running properly.

When choosing AT automatic transmission oil, we need to pay attention to the following:

1.Choose an oil that matches the make and model of your vehicle. Transmission fluids can vary from make and model of car to car, so it's important to know what type of oil you need for your vehicle.

2.Determine the viscosity grade of the oil. The viscosity grade of AT automatic transmission oil is usually Destron or Mercon standard. We need to choose the appropriate viscosity grade according to the recommendations of the vehicle manufacturer.

3.Buy high-quality oils. When choosing an AT automatic transmission oil, we should choose a product with good quality to ensure that it can provide adequate lubrication and protection.

In conclusion, it is important to choose the right oil for automatic transmissions to ensure the normal operation of the vehicle and extend the service life of the transmission. We should choose the most suitable oil according to the brand and model of the vehicle, viscosity grade and product quality.

Here's what you're numbering:

Manual transmission must be used for gear oil, according to different transmissions and conditions of use to choose different grades of oil;

3.Automatic transmission uses automatic transmission to tease special gear oil, also called ATF, which also selects different grades of oil according to different transmissions and use conditions;

4.Ordinary gear oil can not be used in automatic transmissions, because in addition to lubrication and heat dissipation, automatic transmission oil also has the function of transmitting torque, and the electronic components sold inside the automatic transmission have high requirements for oil.