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Is it necessary to change the transmission oil for sedans?

2 Answers

VonKaden

08/26/25 5:37am

It is necessary to change the transmission oil for sedans. The transmission oil of a car should be replaced every 3 to 4 years, or when the mileage reaches 60,000 to 80,000 kilometers. If the transmission oil is not replaced after prolonged use, its lubrication effect will weaken, leading to ineffective lubrication, which can affect the operation of the hydraulic system and cause unstable pressure in the car's transmission. Methods for changing transmission oil: 1. Gravity replacement: Loosen the bolt of the oil pan and let the transmission oil flow out by gravity; 2. Circulation machine replacement: Store the new transmission oil inside the circulation machine, connect the transmission and the circulation machine through pipeline interfaces, and the new oil will push out the old oil under the action of the circulation machine; 3. Remove the oil pan for oil change, and the transmission oil filter can also be cleaned at the same time.

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Bonnie

09/08/25 7:53am

I've been driving for over a decade, and of course, transmission fluid needs to be changed regularly, otherwise, the car will eventually have problems. I remember last time my friend's sedan neglected this, driving 80,000 kilometers without an oil change, and the transmission got so stuck that it shook badly when shifting gears, ending up costing several thousand dollars for a major repair. Manufacturer manuals generally recommend changing it every 40,000 to 60,000 kilometers, or every two years, depending on usage frequency and road conditions. Old oil tends to oxidize and deteriorate, losing its lubricating properties, which accelerates wear on the internal metal parts of the transmission and can also lead to the buildup of impurities that clog the valve body. I always go to the shop on time, where the mechanic uses professional equipment to drain the old oil and add new oil—simple and worry-free. Don’t delay to save a hundred bucks, or you might end up paying double for repairs later, which would be truly frustrating.

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