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What Are the Functions of Automatic Transmission Fluid?

1 Answers

McNicole

07/30/25 3:10am

Transmission fluid functions include heat dissipation, lubrication, and cleaning. Detailed functional analysis: Transmission fluid dissipates heat generated by the interaction between gears, which produces significant amounts of heat requiring lubrication for cooling. It lubricates to ensure smoother gear engagement and cleans to maintain the shifting system's cleanliness, thereby extending the lifespan of the transmission components. Transmission fluid replacement considerations: Transmission fluid gradually degrades over time. If not replaced regularly, its viscosity and lubricating properties diminish, and it may adhere to critical components. Contaminated fluid can cause metal particles suspended in the oil to continuously abrade bearings, races, gears, and other parts, potentially leading to transmission vibration, failure to shift, misalignment, or even gear and bearing fractures. Always use the specified transmission fluid for power transmission systems; never substitute with manual transmission fluid for cost or convenience, as this can cause severe clutch and brake erosion.

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