What is the difference between FE and TC transmission fluids?

[Aragorn]

The difference between FE and TC transmission fluids lies in their viscosity. FE has lower viscosity, making the oil thinner, which ensures smooth cold starts but may result in thinner oil film and poor lubrication during high-speed operation. TC has higher viscosity, making the oil thicker, which can make cold starts difficult but provides better oil film protection during high-speed operation. Hazards of not changing transmission fluid: 1. Damage to the transmission's shift control mechanism; 2. Abnormal wear of gears and clutch plates inside the transmission; 3. Impact on the normal operation of the transmission, leading to damage to the transmission valve body. Transmission fluid is not the same as engine oil. Although both serve a lubricating function, they have different roles and should not be confused. Difference: Engine oil is the lubricant for the engine system, possessing properties such as oxidation resistance, wear resistance, and corrosion prevention, while transmission fluid is primarily used to keep the gear system clean and extend the service life of internal transmission components. Due to the different structures and operating environments of the transmission and engine, transmission fluid cannot be used as engine oil, nor can engine oil be used as transmission fluid.