There’s a common misconception about the ‘lifetime transmission fluid’ or ‘sealed-for-life transmission’ of mainstream automakers like Audi, Toyota, BMW, Land Rover, Jaguar, Dodge, Jeep, etc. The claim is that the automatic gearboxes could last the vehicle’s lifespan without an automatic transmission fluid change, but it sounds more like a marketing gimmick than the underlying truth. Inside a modern automatic transmission is a complex array of mechanical, electrical, and hydraulic components that work day and night, no matter the weather.
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