Transmission Fluid Explained – How to put transmission fluid in a car

Your car runs on various kinds of fluids. To keep your engine intact, you need engine oil. Similarly, to keep your car in running condition, you need transmission fluid. In this article, you will learn everything about transmission fluid. You will understand why transmission fluid is vital for your car, what are the types of transmission fluids, how to check it, and how to put transmission fluid in a car.

Why is Transmission Fluid Important?

Transmission fluid eases friction in a car’s manual gearbox by lubricating the bearings and metal parts inside it. However, if you own an automatic car, then it helps the internal components of your car work efficiently by providing hydraulic pressure and lubrication to the moving parts.

It becomes very hard to change gears in a manual car if the transmission liquid is below the required limit. Though automatic cars don’t need manual gear changing, the automation has to happen smoothly.

Different Types of Transmission Fluids


Typically there are two major types of transmission fluids. For manual cars, you need manual transmission fluid, and for automatic cars, automatic transmission fluid is required. There are others as well including synthetic transmission fluid and traditional transmission fluid.

Manual transmission fluids are used in manual vehicles, usually older models. However, it is a heavy liquid that cannot be put into automatic cars, and it is advised not to use it for some modern manual cars too.

On the other hand, automatic transmission fluid is used in automatic cars, and it has many advantages from lubricating the gearbox to cooling transmission. Moreover, it also helps with torque converter operation, clutch friction, and valve body operation.

As far as synthetic and traditional transmission fluids are concerned, traditional fluids are made of crude oil and hydrocarbons. Whereas, synthetic fluid is the result of various chemical reactions. One major benefit of using a synthetic fluid is that it has lesser chances of getting oxidized and thinning in warm weather.

How to Select Transmission Fluids for your Car?

When selecting transmission fluids, you have to be very vigilant and careful. If you choose the wrong type of fluid, it may not lubricate the parts correctly, which may lead to transmission failure.

The best way to select a perfect transmission liquid for your car is to go through the owner manual of your car. It is generally mentioned in the manuals that you get from the manufacturers, so you will get the perfect idea which is the best suitable option for you.

How to Check Transmission Fluid?

If you have a problem with changing the gear in a manual car or if your automatic car doesn’t start smoothly, then the chances are that the transmission fluid in your car is low.

However, if you know how to put transmission fluid in a car but before you put the fluid in your car, you must check it. Here is how to check transmission fluid.

Firstly, park your car on a leveled surface. It is important because otherwise, you won’t be able to determine the levels accurately. Once after parking your car and switching on the engine, open your car’s bonnet and look out for dipstick and a pipe that contains the fluid.

You can locate this with the help of the owner’s manual.

Once you locate the pipe and dipstick, bring out the dipstick from the pipe and clean it thoroughly. Then put the dipstick back in the pipe. Bring it out once again and check the mark.

There is a mark on the stick that shows the ideal limit. If it is below that level, it indicates that you need to put transmission fluid in your car.

How to Put Transmission Fluid in a Car?

Once you know that your car needs more transmission fluid, here is how to carry out this ritual. Before doing anything else, please find the correct fluid for your car through the manual. It is very important because the wrong fluid can cause transmission failure.

After you’ve bought the correct fluid, then open the pipe and gradually put the transmission fluid in your car. Don’t go all in at once. Start by putting a small amount. After each pour, check the levels through the dipstick.

Once you reach the limit, stop pouring. Take a drive and change all the gears, from the first till the last one. After you run your car through each gear, park it once again and let the fluid circulate throughout the interior parts of the car.

Check the levels of the fluid once again to ensure there is no leak. If there is, your fluid levels would have fallen drastically.

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