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

1 Answers
MaxMarie
07/24/25 3:08am
Consequences of not changing transmission fluid for a long time: 1. Prolonged use of gearbox lubricating oil will cause its viscosity to become thinner, leading to decreased lubrication performance, reduced sealing performance, increased resistance and wear, resulting in unstable pressure, which affects the accuracy of hydraulic system operation. Smoothness and response speed will also be affected; 2. After deterioration, the cooling performance and anti-oxidation performance of the oil will decrease, making it prone to problems such as high oil temperature, creating a vicious cycle that further shortens the life of the oil and transmission components. The main function of transmission fluid is to keep the shifting system clean and to lubricate and prolong the life of the transmission device. The replacement cycle of transmission fluid is longer compared to other oils, and the transmission fluid of some car models is of the maintenance-free type. Unless there is a leak, users do not need to replace it regularly.
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