The car is a means of transportation that everyone uses every day, whether it is commuting to work or picking up and dropping off children, having a car can greatly improve the convenience of life. In the past, the price of cars was relatively high, which was a luxury for most people, and the car at that time was not only a means of transportation, but also a status symbol.
The times are progressing, after so many years of development of automobiles, production technology has made great progress, the corresponding costs have also been reduced a lot, and now almost into thousands of households. Although there are more and more families in the mainland that own cars, not many people really understand cars. Many novice drivers are just able to get the car moving, but they don't know how to maintain the car.
The cost of car maintenance is actually an important expense, and even sometimes it is higher than the cost of buying a car, so some people say that they can afford to buy a car but can't afford to keep a car. After all, the car is a large precision machine, although it is very durable, but there are always cases of aging failure. If it is the core component of the car, such as the engine problem, then it will cost several thousand yuan to repair it at a time.
In fact, some problems were not serious at the beginning, but they did not attract the attention of the driver, and over time, small problems became big problems, and at that time, they would suffer big losses. The oil in the gearbox is a place that is easy to be ignored by the driver, on the one hand, the driver does not know much about the transmission oil, on the other hand, many car companies publicize the so-called transmission lifelong maintenance-free, so that the driver relaxes his vigilance.
In fact, the gearbox is a very important part of the car, and this part needs to be maintained, otherwise it will fail, in fact, many gearbox damage problems, are due to the transmission oil is not replaced in time. Therefore, the gearbox needs to be maintained by the driver in use, so how long is the transmission oil replaced? If you follow the guidance of the "Car Maintenance Manual", the transmission is usually 8 years, or 80,000 kilometers after the oil is changed.
However, not all cars are required in this way, because the replacement of transmission oil and the use of the car are closely related, affected by various factors, and the replacement time is also quite different. As for the so-called "lifelong maintenance-free" advertised by many car manufacturers at the time of sales, this is mainly a routine at the time of publicity, and the reliability is not high. If you look at the car maintenance manual with the car, it will still indicate the replacement time of the transmission oil, which means that the gearbox still needs to be maintained.
Therefore, the oil of the gearbox must be replaced, if not changed, not only the gearbox will have various problems, but also will cause serious damage to the car itself, serious and even affect the normal use of other parts of the car.
However, the replacement of transmission oil is exquisite, not casually replaced, different models of replacement of the oil is not the same, especially the manual and automatic transmission of these two models, transmission oil is even more different. The difference between the two models is mainly due to the different working principles of the gearbox, the transmission of the manual transmission car is controlled by the connection of the gears, and the automatic transmission relies on the hydraulic torque converter to regulate the speed.
Hydraulic torque converter is a more professional term, its role is to convert the mechanical energy input of the active shaft into kinetic energy by relying on the action of centrifugal force! Therefore, the oil of the gearbox is not replaced, the power cannot be effectively transmitted to other parts, and the car naturally cannot operate effectively. The key role of transmission oil is to carry out power channeling, to play this role, the oil needs to have a strong viscosity, and different transmission oil viscosity index is not the same.
In general, the average viscosity index of transmission oil in manual transmission cars is 125, while automatic transmission cars have a higher viscosity index because of the greater role of the transmission, reaching 183. The specific viscosity index of the transmission oil of each car is different, which is noted in the "Car Maintenance Manual" attached to each car, but many drivers do not know much about this when buying a car, nor do they read the manual requirements. Therefore, when the driver friend replaces the transmission oil in the car, he must replace it in strict accordance with the requirements of the "Car Maintenance Manual", otherwise, it will cause damage to the car transmission.
Of course, the "car maintenance manual" mainly plays a guiding role, the requirements are only for a specific situation, and in the actual driving process, the use of the car is quite different, each specific part of the damage is not the same, at this time it is necessary to replace the parts according to the specific situation. When maintaining the car, it is best to go to a special 4S shop, but the price is also relatively high, if it is to save money, choose a third-party maintenance point, you must find a good reputation of the business, the driver usually also have to take more care of their own car, so that they can go steady and far.