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How Often Should Transmission Fluid Be Changed in a Car?

2 Answers

EvanLynn

07/24/25 8:27am

Car transmission fluid replacement is typically recommended every three years or 60,000 kilometers. However, most 4S dealerships usually advise changing it at the 60,000-kilometer mark, meaning the replacement is primarily mileage-based without strict time constraints. Over time, transmission fluid loses its viscosity, leading to reduced sealing effectiveness and diminished lubrication. Inadequate lubrication can affect the hydraulic system's performance, causing unstable pressure in the car's transmission. Below are the potential hazards of not changing transmission fluid for an extended period: 1. Delayed fluid replacement can result in abnormal wear and severe deterioration of the transmission fluid. 2. Prolonged use of old fluid under high-speed and high-temperature conditions can cause it to degrade and evaporate, accelerating mechanical wear and potentially damaging internal transmission components, thereby shortening the vehicle's lifespan. 3. Long-overdue fluid changes can cause the fluid to form particles, clogging oil passages and damaging valve bodies, directly impacting system oil pressure and power transmission. This may lead to sluggish response and rough gear shifting in the transmission.

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VonMila

08/11/25 4:03am

Changing transmission fluid is actually quite a nuanced matter. Having driven cars of different brands, I've found that automatic transmission fluid is generally recommended to be changed every 30,000 to 60,000 kilometers or every 2 to 4 years, but this depends on your driving habits. If you frequently drive in stop-and-go traffic or take long trips, the wear is faster, and the fluid gets dirty more easily—changing it earlier is definitely the right move. Manual transmissions might go a bit longer, around 50,000 to 80,000 kilometers, but don't drag your feet on this. If you delay, aging fluid can cause gear shifts to become rough, and in severe cases, the transmission could fail—repairs can be painfully expensive. Regularly checking the fluid's color and condition is also crucial. If it's dark or has a burnt smell, address it immediately. I recommend checking your owner's manual—following the manufacturer's guidelines is the most worry-free approach. Remember, timely maintenance extends your car's lifespan and helps avoid breakdowns on the road.

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