What are the properties of gear oil? How often to replace? What is the difference between manual transmission fluid and automatic transmission fluid?
September 25, 2022
Q: How often should the Gear Oil be changed? A: There are two main types of gear oil, one is synthetic oil and the other is mineral oil. If the synthetic oil used has a long life, it basically does not need to be replaced within 100,000 kilometers. It is different. Mineral oil needs to be replaced every 2-3 years or 40,000-60,000 kilometers. Different types of gearboxes and drive axles use different viscosity grades. Small passenger cars need a viscosity grade of 75w-90.
Q: What is the difference between motor oil and gear oil? A: Oil is a general term, that is to say, as long as it is machine oil, it is called oil, and gear oil can be regarded as a generalized oil. But the term engine oil is what we usually refer to as engine oil. In theory, the functions of oil and gear oil are the same, mainly for lubrication, cleaning, rust prevention, heat dissipation, etc., but in fact, there are still differences between the two. Q: How many kilometers to change the automatic transmission oil? A: Under normal circumstances, the automatic transmission oil needs to be replaced every two years or every 40,000-60,000 kilometers. However, it also depends on the model, and different models have different requirements. As far as Japanese models are concerned, it is recommended to replace them every 40,000 to 60,000 kilometers, and for vehicles that drive more at high speeds, it is recommended to replace them every 40,000 kilometers.
Q: Can the vehicle automatic transmission oil be used universally? A: The automatic transmission oil is not universal, and the composition of the transmission oil matched with each transmission is different. Using an unmatched oil can cause internal damage to the transmission, accelerated gear wear, and damage to the transmission control module. Today's automatic transmissions, some of which are hydraulic automatic transmissions, some are dual-clutch transmissions, and some are continuously variable transmissions with analog gears. They come from different manufacturers, and their structures, materials, shifting characteristics, friction performance requirements, high temperature characteristics, viscosity requirements, etc. are all very different, so there are great differences in oil requirements.
Q: What is the difference between manual transmission fluid and automatic transmission fluid? A: The viscosity of manual transmission oil is higher than that of automatic transmission oil, which is convenient for better lubricating the grinding surface of the manual transmission gear. The fluidity of automatic transmission fluid is higher than that of manual transmission fluid, which facilitates faster and more stable transmission of engine power. The heat dissipation of the automatic transmission oil is higher than that of the manual transmission oil, so as to avoid the temperature being too high, the lubricity being reduced and the movable parts of the automatic transmission being stuck, and the sealing parts leaking. Compared with manual transmission oil, automatic transmission oil mainly has more shear resistance: that is, it prevents the torque converter from slipping; wear resistance: because the structure of automatic transmission is more complicated than that of manual transmission, it is necessary to shift gears. The tank oil has better anti-wear resistance; higher oxidation stability: Compared with the manual transmission, the automatic transmission generates more heat when shifting gears, and the working temperature is also higher, so the transmission oil is required to be able to operate at a higher temperature. work at high temperatures.
