变化流体会不好吗？

作为汽车爱好者，我喜欢照顾自己的骑车。这包括定期更换机油，制动油，散热器流体和变速箱流体等流体。但是，如果汽车运行良好，我一直都听到了从机械师那里听到的，以避免更换变速箱油。

My answer to that is off-course the car is working fine because I regularly change fluids. I hopped on the internet forums to discuss this and got more people saying that I should not bother replacing transmission fluid. This doesn’t make sense to me.

然后有一天我遇到了这个Youtube 视频that explained it really well:

So what does he recommends? I learned from this that it’s crucial to change the transmission fluid periodically. But, if your car is a high mileage vehicle (think 94k miles or 150,000 km), and is still running on factory-filled transmission oil, you are better off just leaving it alone.

Fresh transmission fluid has good cleaning properties. This can wash away varnish from the clutch pack, causing clutch slippage. While Flushing the transmission with a machine can damage aging seals, which can cause leakage and hydraulic problems.

You might take chances with transmission oil change but don’t flush the system. If no problems crop up after oil change, then congratulations you have increased the life of your transmission. But a lot can go wrong if you change the transmission oil of a high mileage engine. Let’s see why:

Transmission oil is really thin so that it can move around the crevices of the automatic transmission. As the oil gets old, it becomes thicker and becomes less slippery. Sometimes this extra friction from the old oil is what keeps the clutch working properly. The problem arises when a fresh trans fluid is added to the worn out transmission- The clutch might start slipping or the car might refuse to shift out of gear.

如果您继续前进，倒了新鲜的油，现在您的离合器正在滑动。在这种情况下，您该怎么办？好吧，您可以尝试使用变速箱添加剂来防止离合器滑动。许多力学推荐Lucas transmission fix添加剂。

However, it’s best to change transmission oil at around every 50,000 miles (80,000 km). If you regularly do this that you won’t have to wonder if changing transmission oil next time will cause trouble.

Several vehicles nowadays come with lifetime transmission fluid that the company says doesn’t need replacement. But, that’s not really your best choice if you do intend to keep the car for a long time. Car manufacturers usually do to comply with the environmental norms and to show that their cars are low maintenance.

您应该冲洗还是只是更换变速箱液？

When you want to change the transmission fluid,您有两种选择 - 完整的冲洗或液体变化。

液体变化意味着从变速箱中排出旧的流体，并用新鲜的流体重新填充。传输油冲洗意味着从锅，冷却器线和变速箱的缝隙中取出旧油。冲洗是使用机器完成的。

Fluid change means there will be some percentage of old fluid remaining in the gearbox unit (sometimes up to 50%) but flush ensures that every part of gearbox gets rid of old oil. So, what’s better for you?

As a general rule,如果您怀疑过去没有很好地维护变速箱，那么最好只是改变流体而不要打扰潮红。That’s because flushing the transmission increases the chance of some gunk getting stuck in the narrow oil channels. And it can even damage the aging rubber seals.

但是，如果您定期维护汽车，则冲洗是一个更好的选择，因为它消除了几乎所有的旧变速器油。How much does transmission oil change cost?

What Transmission oil should you use?

就像发动机油一样，市场上有大量的变速箱流体。但是，仅使用汽车制造商的建议非常重要。

Different transmission fluid has different base material and additives. Using the recommended transmission oil would mean that the transmission is compatible with it as it’s been tested using this oil.

读：不同类型的自动变速器&不同类型的手动变速器

Another video by Scotty Kilmer:

• Author
• Recent Posts

Siddharth Sharma

Siddharth has always been passionate about Cars and Bikes. He was the kind of kid that always had the latest Auto magazine in his school bag. He had this dream- to become a professional racecar driver. Finally, in 2012 he found himself racing as a rookie driver in the Polo R Cup national racing championship. Over time he had to readjust the sail and get into automotive journalism to continue enjoying machines on wheels.

Latest posts by Siddharth Sharma(see all)

• 4 Symptoms of a Bad Car Thermostat & How to Fix it?- July 1, 2022
• Do Octane Boosters Work? Our Top 5 Recommendations- June 21, 2022
• 更换汽车电池的成本- June 2, 2022