Can I Use Transmission Fluid for Brake Fluid

Transmission fluid is different than brake fluid. Transmission fluid is designed to withstand higher temperatures and has a lower boiling point. The difference between the two fluids can be seen in their chemical composition.

Using Transmission Fluid

While both are made up of glycols, transmission fluid contains more ethers, giving it much better heat properties. If you want to know the answer to this question, “Can I Use Transmission Fluid for Brake Fluid?” then read the blog till the end.

Difference Between Brake Fluid and Transmission Fluid

Brake Fluid:

Brake fluid is a non-flammable, clear to amber liquid made up of several different chemical components in various proportions. It can be used as a hydraulic fluid for the braking system if mixed with glycols and water. Ethers are one of the major components found in Brake Fluid. Ethers provide better heat transfer than glycols and have a much higher boiling point than other fluids. They’re also resistant to corrosion and oxidation during high-temperature exposure.

Glycol compounds are added to brake fluid to make it hygroscopic or moisture attracting, so that small amounts of water don’t contaminate the seals on your brake calipers or create air bubbles that weaken your brakes. The main ingredient found in brake fluid is anhydrous glycerine. It’s a colorless, odorless, and viscous liquid that also contains ethers and alcohol. Glycol compounds like ethylene or propylene glycol are used to regulate the fluid’s boiling point under different conditions.

Auto manufacturers consider brake fluids as consumable items since they change each application. As such, you have to replace them before you can use them again, but it doesn’t mean they’re wasted materials. Rather, you can recycle your old fluids for other uses around your home or garage before replacing them with new ones.

Transmission Fluid:

Transmission fluid is a transparent, amber, or reddish-brown liquid that’s made of non-toxic ethylene glycol. It also contains additives to prevent corrosion and cavitation, further improve heat transfer, and control viscosity. Ethers are used extensively in transmission fluids because they have high boiling points, making them the ideal base fluid for heavy-duty transmissions.

Mixtures of synthetic esters, ethers, and polymers with additives like anti-corrosives help provide better heat resistance and reduce friction between metal parts when applied under heavy loads. For example, one of the major differences between transmission fluid and brake fluid is that transmission fluids usually contain 75-90% glycols and ethers. In contrast, brake fluids contain more alcohol and glycol compounds.

Because transmission fluid needs to withstand high temperatures, companies use synthetic esters as a base since they’re resistant to oxidation at high temperatures and better lubricants than other materials. Under normal conditions, it can withstand up to 180 degrees Celsius or 356 degrees Fahrenheit without any difficulty. The cooling properties of transmission fluids are also important in keeping engines cool while operating under heavy loads for extended periods.

Break Fluid And Transmission Fluid

What Can Happen if You Put Transmission Fluid in Brake Fluid?

Since brake fluid and transmission fluid are two different types of fluids, it’s not a good idea to put them together. Mixing the two can cause all kinds of problems for your car and will void its warranty. Not only will mixing the two liquids create an ineffective solution, but they’ll also damage expensive equipment like seals, hoses, and sensors in your braking system.

This is one of those questions that you’re better off avoiding even if you’ve used the wrong type of fluid before or won’t notice any changes when using them together initially. For example, some manufacturers don’t recommend using brake fluids for automatic transmission because certain additives found in Automatic Transmission Fluid (ATF) are designed specifically for transmissions under pressure and high temperatures, which aren’t present in hydraulic braking systems.

Where Can I Buy Brake Fluid?

You can buy brake fluid from your local auto parts store or dealership. They usually keep it on hand to replace leaking fluids in their service area. You may also find some cheap products online at sites like Amazon if you want to stock up for future use but be warned that it’s illegal to use brake fluid instead of ATF when operating an automatic transmission. 


Replace with the appropriate fluid before deciding to drive a vehicle! Use What is Best suited for your needs at the moment! Not all vehicles need different types of fluids, So research is advised. Just because one car uses something doesn’t mean another does.

What Are The Alternative for Brake Fluid?

Brake fluid should only be used in hydraulic braking systems. Hydraulic brakes are those that work by pressing brake pads against rotor surfaces or discs to slow down your car’s wheels.  Premixed fluids, such as power steering fluid and automatic transmission fluid, can also help improve the performance of your vehicle’s braking system.

Power steering fluids basically have very similar characteristics with ABS brake fluid which can be used interchangeably if you leak in one system and don’t want to buy new fluid until you know exactly what type your vehicle needs. On top of that, it won’t hurt the performance of either braking system either since they’re still functioning separately even when mixed.

Things To Consider When Using Power Steering Fluid

Power steering fluid is also a good alternative to brake fluids for those who drive primarily in the suburbs or urban areas and don’t use their brakes heavily during normal driving conditions. But, if you’re going to be putting your vehicle on long highway drives or off-road excursions, it’s best not to use power steering fluid in your car’s hydraulic brakes.

Power steering fluids are usually watery and contain additives that help reduce drag when turning wheels at low speeds. However, the downside to using them instead of brake fluids is that they may leave residue on metal parts which can cause corrosion over time. This means frequent flushings are necessary if you want to enjoy clean fluid throughout your vehicle’s braking system.


You should avoid using transmission fluid for brake fluid. Transmission fluids are made to lubricate the gears in your engine, and they will clog up your brakes if you try to use them as such. On the other hand, brake fluids have special additives that keep them from sticking together or corroding as transmission fluid would do. It’s always a good idea to check with an auto mechanic before trying something new when it comes to cars! We hope You get the answer to “Can I Use Transmission Fluid for Brake Fluid?” Let us know your thoughts on this topic by commenting below!

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