Regarding car maintenance, I believe that many drivers know that in the maintenance of cars, various oils, oil, brake oil and antifreeze are needed. But there is a kind of oil that we often forget, that is gearbox oil.
The gearbox is divided into a manual gearbox and an automatic gearbox, and each gearbox is designed differently, so the original factory has its own designated special gearbox oil.
Transmission oil action
1. The gearbox generates a lot of heat when it is working. At this time, the transmission oil can play a role in heat dissipation.
2. In daily driving, we need to change gears according to driving conditions, and in order to make the shifting smoother, we need gearbox oil to lubricate.
3. Keep the gear system clean and extend the life of the transmission.
4, low temperature resistance, can also carry out extremely effective lubrication at low temperatures.
Because the profit of car care products is relatively large, many unscrupulous traders have started to buy and sell fake and shoddy maintenance products. Therefore, when you buy gearbox oil, you must be careful. Using fake and shoddy gearbox oil will cause serious damage to the gearbox.
We can distinguish the authenticity of transmission oil from these five aspects.
1. Smell the smell of oil: There is a burnt smell in the genuine oil;
2, look at the color: genuine oil is black to black and green;
3, look at the oil bubbles: after the authentic oil shake, rarely see bubbles;
4, look at the viscosity of the oil: genuine oil is not easy to remove the hand, can draw;
5, look at the fluidity of the oil: genuine oil "hanging bottles" after a long time is not clean.
The reason that transmission oil is easily overlooked is that the transmission cycle of the transmission oil is longer than other fluids. Many people do not know how often the transmission oil should be replaced, and the cost of replacing the transmission oil is higher than other oils. . Then: How often does the transmission oil change?
automatic transmission The automatic transmission is normally replaced with automatic transmission fluid every 2 years or every 40,000 km.
If the vehicle has a smooth gear and the gearbox noise does not change much, it can be replaced. If the vehicle appears to be simmering when shifting gears, especially if the gearbox noise increases significantly after the driving speed exceeds 100 km, it is necessary to consider whether to change the transmission oil. .
Most of the Nissan models are recommended to be replaced once every 4 to 80,000 kilometers. If you usually run at a high speed, it is recommended that you change it once for 40,000 kilometers.
For manual transmissions, it is generally recommended to replace the transmission oil every three years or every 100,000 kilometers, because the internal structure of the manual transmission is much simpler than that of the automatic transmission.
In addition, when we change the transmission oil, we should pay attention to the amount of transmission oil, too much or too little, may damage the car's gearbox.
Excessive oil may cause excessive resistance during operation of the machine, or cause the transmission oil to foam and deteriorate, causing the machine parts to wear abnormally.
If the oil is too small, it may cause insufficient power, slow shifting, etc. The long time may cause the gearbox to be hot and unable to drive normally. Therefore, when checking the transmission oil, it should be measured accurately.
The replacement of the transmission oil is not as simple as changing the oil. The reason why the gravity method can't change the oil is because there are too many oil deposits in the gearbox. It is best to use a cycle machine to change the oil so that the impurities can be treated together.
It is recommended to go to the 4S shop to change the transmission oil. Although the transmission brand is the same, the workmanship, materials and training will change according to the changes of the brand and the model. Don't be greedy. Be aware that although gearbox oil is more expensive, repairing a gearbox is more expensive.
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