What Is A Transmission Fluid?

Dustin Hawley | Jul 12, 2023

Ever wondered how easily you switch gears using your car’s transmission? The transmission fluid is a lubricant for your vehicle's transmission system. It helps clean and protect the transmission from debris and dirt, ensuring all parts perform at their best. As the transmission breaks down, it must get replaced to ensure it still provides lubrication and cooling. This article will explain what a Transmission fluid is, how they reduce wear and tear, and how to change it.

What Is A Transmission Fluid

What Is Transmission Fluid? 

Transmission fluid is a specially formulated lubricant designed to protect your car's transmission gears and clutch packs, enabling smooth shifts and preventing heat from destroying the fluid. Transmission fluids are lubricants used in internal combustion engines, such as those found in automobiles. This fluid helps reduce friction between moving parts and reduce the amount of heat generated. It also cools the transmission by transferring heat away from the transmission and other internal engine components. It is essential to check your transmission fluid level regularly and change it if it is low or begins to break down.

Types Of Transmission Fluids

Transmission fluid is an essential component of the vehicle's transmission system. Different transmission fluids are available; Dexron/Mercon and Multi-Vehicle Synthetic are the most common. CVT fluids require specific fluid, and Type Fs are not ideal. Manual transmission, automatic transmission, automated manual transmission, and continuously variable transmissions require fluid types. A suitable automatic transmission fluid (ATF) is essential for optimal fuel economy and performance.

When To Replace Your Transmission Fluid

Replacing transmission fluid should be done according to the manufacturer's maintenance schedule for many automatic transmissions. Before agreeing to a fluid change, assess the type of driving you to do to determine the frequency of fluid changes required. Depending on the transmission type, the fluid must be changed every two to five years or 30,000 to 50,000 miles. You might wonder how often you should replace your car’s transmission fluid. It is a good idea to check your vehicle’s transmission fluid about once a month to monitor fluid level and condition. Modern vehicles lack transmission dipsticks or have them in hard-to-reach locations. If performance suffers, check your fluid immediately.

Choosing The Right Transmission Fluid

Choosing the suitable transmission fluid is essential for ensuring your vehicle runs smoothly. Here are some tips to help you make the right choice: 

Know Your Vehicle 

Different vehicles require different transmission fluids, and it's essential to make sure you choose the right type for your vehicle. Check your owner's manual for recommendations on the type of fluid that works best for your car.

Understand Your Needs

The type of transmission in your vehicle primarily determines the transmission fluid you need. Manual transmissions require a thicker type of transmission fluid, while automatic transmissions typically require a thinner fluid. Choose the type of fluid that best meets your vehicle's needs.

Consider The Climate 

Some transmission fluids are better suited for colder climates, while others are better for warmer climates. Make sure to consider the climate where you live when choosing a transmission fluid.

Check The Quality 

Not all transmission fluids are created equal. Check the quality of the fluid you’re buying to ensure you are getting a good product.

Look for Recommendations 

If you’re unsure which fluid to choose, look for recommendations from a trusted mechanic or automotive supply store. They can help you find the proper fluid for your vehicle and needs.

How To Change and Check The Transmission Fluid

Changing and checking the transmission fluid is a simple maintenance task that can help you keep your car running smoothly and safely. Here's a step-by-step guide on how to do it: 

  • Check the owner's manual for the type of transmission fluid your car uses and make sure you have the right amount. 
  • Lift the car if necessary and get underneath while looking for the transmission fluid pan.
  • Unscrew the bolts and remove the pan. 
  • Drain the fluid into a container and then check the fluid's color and smell. If it is dark and smells burnt, it needs to be changed. 
  • Clean the pan and reinstall it. 
  • Refill the transmission with the correct type of fluid. 
  • Now, start the car and check the dipstick for the correct level. If the level is low, add more fluid, replace the dipstick, and close the hood.

Summary

Transmission fluid is a specially formulated lubricant designed to protect your car's transmission gears and clutch packs, enabling smooth shifts and preventing heat from destroying the fluid. Depending on the transmission type, the fluid must be changed every two to five years or 30,000 to 50,000 miles. Before choosing the suitable transmission fluid, know your vehicle, understand your vehicle needs, consider the climate, check the quality of the transmission fluid, and finally, look for recommendations from a trusted mechanic or automobile supply store.

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