The two important components of the car, the engine and the gearbox, are maintained by oil change, and everyone knows more about changing the engine oil and can change it on time. However, many people do not think so, because it has a long replacement cycle, and often forgets to change, and some people say that the transmission oil does not need to be changed at all, and there will be problems when it is changed. So do you need to change it? Today we will talk about changing the transmission oil.
Let's start with the simplest manual gearbox, which does not require an oil change and can be called maintenance-free for life. Some models also require an oil change, but the oil change cycle is very long, and 95% of owners sell it before they can run the number of kilometers of oil change. So, so to speak, the manual transmission does not require an oil change. Because the transmission oil of manual transmission is relatively simple, it only plays the role of lubrication of gears, and the requirements for lubrication are not high. Because the gears that rotate at high speed are joined together, they are equivalent to a whole, and there is no relative sliding, so the requirements for lubrication are not high. Even if the transmission oil is a little dirty, the desired lubrication effect can still be achieved.
Unlike automatic transmission oil, it not only plays a role in lubrication, but also transmits power. The inside of the automatic transmission is very precise, and the control of the solenoid valve to the gearbox is also very accurate and fast, so that the gear shift is timely and there is no frustration in the gear shift. In fact, this is completely dependent on the transmission oil, which is used to transmit the force. If the transmission oil fails or becomes dirty, first of all, the wear of the gearbox will increase, and secondly, it will lead to poor oil flow in the valve body and oil pipe, resulting in inaccurate force transmission, delayed shifting, and slow transmission response, which also has a great impact on the life of each solenoid valve. If it is more serious, the clutch pads and brake pads will be worn, resulting in complete damage to the gearbox. More than 90% of automatic transmission failures are caused by not changing oil, so automatic transmissions should be changed on time.
So how often do you need to change the oil? Each model is very different, and the difference in kilometers is very large, so you need to refer to the maintenance manual of your car. Some cars are required to be changed after 40,000 kilometers, some cars are 60,000 kilometers, and the longest is maintenance-free for life. For lifetime maintenance-free models, if you don't drive much, 1-20,000 kilometers a year, you can not change it, and the car may have been sold by the time something goes wrong. If you drive more, it's best to change it when you reach more than 100,000 kilometers. For vehicles that require an oil change, it is best to replace them according to the recommended number of kilometers. If you drive in good road conditions, often run at high speeds, walk on the road without traffic jams, drive more carefully, do not drive violently, the number of kilometers can be appropriately extended, but not more than 80,000 kilometers at most, you will have to replace. A change of oil is a few hundred yuan, in case the gearbox is damaged and needs to be overhauled, it will cost thousands of yuan, the gain outweighs the loss, don't take this risk.
If the oil pan is removable, then you need to remove the oil pan and replace the filter element, just like changing the oil filter, which is more thorough. If the filter is maintenance-free, it doesn't need to be replaced, because it can't be replaced. Every time you change the oil and can't replace it thoroughly, there will be a lot of oil in the valve body and torque converter, so it's best to replace the original oil, that is, replace the same oil as your gearbox, the gearbox oil should not be mixed, it is easy to have problems, this is what many people say that the oil change is wrong, and the oil is not correct.
When changing the oil, you may be advised to clean the gearbox, which is to add a bottle of cleaning agent before changing the oil, clean it for a while before releasing it. There is no need at all, because if you don't change it thoroughly, some of the cleaning agent will be stored in the gearbox, just let go of the old one and add the new one, and you need to clean the oil pan if you can remove the oil pan. The normal gravity oil change method can be adopted, that is, the oil screw is opened to let the oil flow out naturally, and there is no need to use a circulating machine, which is a waste of money. However, if you can't find the original oil, you can use a circulator to replace it, completely replace the oil, and then add new oil.
Source: Autopedia