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How Long Does Automatic Transmission Fluid Last? | Age Clues

Automatic transmission fluid often lasts 30,000 to 100,000 miles, based on heat, load, and service history. Automatic transmission fluid, or ATF, has a harder job than many drivers think. It moves hydraulic pressure, cools internal parts, reduces friction, cleans tiny deposits, and helps clutches grab at the right moment. Once the fluid ages, the transmission

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