Updated at: 24-06-2022 - By: Lucas

I like cars, so I try to take good care of mine. Fluids like engine oil, brake oil, radiator fluid, and transmission fluid need to be changed on a regular basis. But mechanics always tell me not to change the transmission oil if the car is running well.

My answer is that, of course, the car works fine because I change the fluids on it all the time. I went to online forums to talk about this, and more people told me that I didn’t need to replace the transmission fluid. This doesn’t make sense to me.

Then one day I found this YouTube video that did a great job of explaining it:

Then what does he suggest? This taught me that it’s important to change the transmission fluid every so often. But if your car has a lot of miles on it (like 94k miles or 150k km) and is still running on the transmission oil that came with it from the factory, you should just leave it alone.

Transmission fluid that isn’t old cleans well. This can wash the varnish off the clutch pack, which can make the clutch slip. While running a machine through the transmission can damage old seals, which can lead to leaks and hydraulic issues.

You can take a chance when you change the transmission oil, but you shouldn’t flush the system. If you change the oil and nothing else goes wrong, you have just made your transmission last longer. But if you change the transmission oil on an engine with a lot of miles on it, a lot can go wrong. Why is that?

So that it can get into all the parts of an automatic transmission, transmission oil is very thin. The oil gets thicker and less slippery as it gets older. Sometimes the old oil’s extra friction is what keeps the clutch working right. When new transmission fluid is added to an old transmission, the clutch may start to slip or the car may refuse to change gears.

If you went ahead and put in new oil, but now your clutch is slipping, you may need to replace it. How can you handle this? Well, you could try adding something to the transmission to keep the clutch from slipping. Many mechanics say that the Lucas transmission fix additive is the best.

But transmission oil should be changed about every 50,000 miles (80,000 km). If you do this often, you won’t have to worry about what will happen the next time you change the transmission oil.

Several cars on the market today come with transmission fluid that the company says never needs to be changed. But if you plan to keep the car for a long time, that’s not the best choice. Most car companies do this to meet environmental rules and show that their cars are easy to take care of.

Should you Flush or just Change the Transmission fluid?

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There are two ways to change the transmission fluid: a “complete flush” or a “fluid change.”

To change the fluid, you have to drain the old fluid out of the transmission pan and put in new fluid. When you flush the transmission oil, you get rid of the old oil in the pan, the cooler lines, and the transmission’s cracks. A machine is used to do the flushing.

Fluid change means that some of the old fluid will stay in the gearbox (sometimes up to 50%), but a flush makes sure that all of the old oil is gone from the gearbox. So, what do you think is better?

If you think you haven’t taken good care of the transmission in the past, it’s usually best to just change the fluid and not bother with a flush. This is because flushing the transmission makes it more likely that gunk will get stuck in the oil channels, which aren’t very big. And it can hurt the rubber seals if they are old.

But if you take care of your car regularly, flushing is better because it gets rid of almost all of the old transmission oil. How much does it cost to change the oil in a transmission?

What Transmission oil should you use?

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There are a lot of different transmission fluids on the market, just like there are a lot of different engine oils. But it is very important to only use what the car’s maker says to use.

The base material and additives in each type of transmission fluid are different. If you use the recommended transmission oil, it means that the transmission has been tested with this oil.

Read: Different kinds of automatic transmissions and different kinds of manual transmissions.

Is it bad to change transmission fluid on high mileage cars?

When a car with over 100,000 miles on it gets its transmission oil changed for the first time, it can cause problems. There is a chance that the clutch will slip or that the car will get stuck in one gear.

What’s the difference between Transmission oil change and Flush?

To change the transmission oil, you drain the old oil from the drain bolt and put in new oil. Before putting in new oil, a machine is used in Flush to push out the last of the old oil. Only use the Flushing method if you change your transmission oil often. On cars with a lot of miles, it can hurt the transmission.

How much Transmission Fluid Change Costs

A transmission oil change usually costs between $90 and $150 at a third-party repair shop. A dealer with a licence would charge between $150 and $250.