
Automatic transmission fluid is generally recommended to be replaced every 40,000 kilometers or so. Precautions for replacing transmission fluid: 1. Due to the complexity inside the transmission, a circulation machine should be used for fluid replacement to ensure impurities are removed along with the old fluid. 2. When selecting transmission fluid, strictly adhere to the manufacturer's requirements. Avoid using non-original transmission fluid and never opt for counterfeit or substandard products to save money. 3. Even if different car models share the same transmission brand, it is still advisable to replace the fluid at a 4S dealership. Although the transmission brand may be the same, the craftsmanship, materials, and tuning can vary depending on the brand and model. Do not risk major losses for minor savings. Remember, while transmission fluid may be expensive, repairing a transmission is far more costly.

The timing for transmission fluid replacement varies by vehicle, but based on years of driving experience, I recommend consulting the owner's manual. Manual transmissions typically require a change every 30,000 to 60,000 kilometers, while automatic transmissions may need it between 50,000 to 100,000 kilometers. Driving habits are crucial: if you frequently start-stop in city traffic or often haul heavy loads, you should change it earlier, such as every two years. My old Toyota now mostly runs on highways, so I change the fluid every four years, and it's been running smoothly. Remember, don't wait for problems to arise—regular maintenance makes the transmission more durable, avoiding breakdowns or costly repairs. Long-term neglect of fluid changes allows debris buildup, leading to gear wear and eventual transmission failure.

When checking the transmission fluid replacement frequency, I recommend following the official guidelines as the primary reference. Manual transmissions typically require a change every 30,000 kilometers, while automatics last longer, approximately every 50,000 kilometers. You should also consider daily usage: if driving in hot weather or poor road conditions accelerates fluid degradation, the interval should be shortened. I've seen many friends regret neglecting this until their transmission fails. For routine maintenance, manually check the fluid's color and viscosity; if it appears black or has a burnt smell, replace it immediately. This habit can save considerable hassle and unexpected repair costs. In short, stay vigilant—the vehicle manual provides clear instructions, just follow them.

How often should transmission fluid be changed? I think it depends on the age of your car. For a new car, it might need changing every 50,000 kilometers or five years. But don't delay too long—once the fluid gets dirty, the transmission will struggle to work. For example, my neighbor saved money by skipping the fluid change, and ended up with stuck gears, costing over ten thousand in repairs. It's best to regularly check the mileage and act quickly if it exceeds the manufacturer's recommendation. Safety first—ensure smooth driving.


