What happens if transmission fluid is not changed for a long time?

[HarleyLee]

Consequences of not changing transmission fluid for a long time: 1. The viscosity of the transmission fluid will become thinner, leading to reduced lubrication performance, decreased sealing performance, increased resistance and wear, resulting in unstable pressure, affecting the working accuracy of the hydraulic system, reduced transmission control accuracy, and decreased shift precision. Smoothness and response speed will also be affected; 2. The cooling performance and anti-oxidation performance of the deteriorated fluid will decline, causing issues such as excessive oil temperature, shortening the lifespan of the fluid and transmission components. Vehicles that never change transmission fluid are highly likely to experience difficulties in shifting gears, frequent gear jumping, and noticeable gear engagement impacts. If these conditions are ignored, the transmission will soon be scrapped. Compared to changing the transmission fluid, the cost of replacing the transmission is much higher.