Is power steering fluid the same as transmission fluid?

Is power steering fluid the same as transmission fluid? Power steering fluid is an essential part of keeping cars and trucks running. As the name suggests, it’s what allows you to steer and turn your vehicle with little to no effort.

Power steering fluid ensures that the power steering hoses, pistons, valves and pump are working optimally. If you don’t stay on top of the quality of your vehicle’s power steering fluid and don’t flush and replace it as needed, your power steering pump will begin to deteriorate.

Read on as Brian Murphy, Universal Technical Institute (UTI) Education and Development Program Manager, answers the question, “What is power steering fluid?” Explains the types of power steering fluid, how to change power steering fluid, what color power steering fluid is, how to flush power steering fluid, and other information on how power steering fluid maintains cars running smoothly.

What is power steering?

A vehicle’s power steering system uses engine power to help reduce the amount of effort required to turn a vehicle’s front wheels. It is a system that helps the driver to have greater control and handling of a vehicle.

Power steering systems can be hydraulic or electric. Hydraulic systems use fluid to apply hydraulic pressure to the system to help turn the wheels of a car. An electric system uses an electric motor and various sensors to detect how much force a driver is applying to the steering wheel and then determines how much assistance the system should add.

What does power steering fluid do?

Power steering fluid is the hydraulic fluid used in the steering system to create a hydraulic link between the steering wheel and the front wheels. That decreases the amount of effort required to turn the wheels.

Power steering fluid also lubricates the moving parts within the steering system. Suppresses foaming and prevents corrosion in the power steering gear and steering pump, keeping vehicles running optimally.

What color is the power steering fluid?

Power steering fluid is typically red, amber, pink, clear, and/or clear. If it’s dark brown or foamy, it probably needs to be changed.

Where is the power steering fluid?

The power steering fluid reservoir is located under the hood, usually on the passenger side of the vehicle, although it can sometimes be found on the driver’s side. The container is usually white or yellow with a black cap that has the words “power steering” or “steering fluid” across the top.

What are the types of power steering fluid?

Automatic Transmission Fluid (ATF) is the same fluid that is used inside the automatic transmission. ATF can also be used in some power steering systems. Some types of ATF include Dexron and Mercon.

Synthetic power steering fluid is a non-oil based fluid that is created in a laboratory. Synthetic power steering fluid is usually designed specifically for the particular car or system for which it is used. Most newer vehicles use synthetic power steering fluid.

There are also non-synthetic mineral-based oil power steering fluids that can be used in applications that accept ATF fluids.

Many people ask, “Is power steering fluid the same as transmission fluid?” Although ATF and power steering fluid are hydraulic fluids, ATF contains different modifiers and detergents that are specifically designed to remove dirt and grease from the transmission system.

What are power steering fluid specification standards?

Power steering specification standards are requirements for fluid viscosity, detergents, additives, and other components. Meeting these standards ensures that the power steering fluid is safe to use in a specific vehicle.

Power steering fluid specification standards are created by standardization organizations. For example, DIN 51 524T3 is the standard given by the German Institute for Standardization, while ISO 7308 is the standard given by the International Organization for Standardization.

Certain vehicles will require the power steering fluid to meet DIN 51 524T3 and ISO 7308 standards. There may be other power fluid standards for certain types of vehicles, such as those made by Japanese car manufacturers.

When should you change your power steering fluid?

When you should change your power steering fluid depends on the type of fluid being used and how much fluid is in the system. The best way to know when to change your power steering fluid is to follow the original equipment manufacturer (OEM) guidelines. In general, power steering fluid should be replaced at least every five years or 50,000 miles.

There may be physical warning signs that your power steering fluid needs to be changed. When you inspect the power steering fluid, it should be clear in color. If it is dark, it is a sign that it is time to change it. If you see dirt, debris, or sludge in your power steering fluid, it’s time to flush the system.

You may also hear a whine or groan when you turn the steering wheel, indicating that you’ll want to have your power steering system checked. If you find it harder to turn the wheel, that may be another sign that it’s time to change the fluid. If there are leaks, you’ll also want to check the power steering fluid level.

To repair the steering wheel fluid, drain or rinse the old power steering fluid from the car and add new power steering fluid. It is important to service the power steering fluid because it can help prolong the functionality of other parts of the power steering.

Transmission fluid vs. power steering fluid

Yourtransmission fluid It is fluid for your transmission system and power steering fluid is fluid for your power steering system. To be more specific, your transmission fluid is responsible for cleaning your transmission. At the same time, it improves rather than reduces the friction between its moving parts.

This fluid is heat resistant and “sticky” in nature, meaning it adds friction between the different components of the clutch pack to get a better grip on them. This is in contrast to motor oil which reduces friction between moving parts.

Meanwhile, power steering fluid, like motor oil, is a lubricant that reduces friction between various parts of the power steering system.

To mix or not to mix, that is the question!

  • For the most part, don’t mix and match:It is a bad idea to substitute a lubricant with a friction enhancer. Don’t do that because in the case of the transmission parts, they will lose their grip, while in the case of the power steering, their parts will get stuck. However, because both fluids are hydraulic fluids. So the power steering fluid should work for a while inyour transmission system. However, in the long run it will affect the gearbox and the pump seals in the long run.
  • Why is it sometimes okay to mix and match?It’s best to use a fluid approved for your car’s specific system, as it’s better to be safe than sorry. You should use transmission fluid for your power steering pump and you should not use power steering fluid in your transmission pump. However, there is an outlier to this rule. You can use your transmission fluid in the power steering pump of vehicles made in the 1970s or earlier. They were less sophisticated systems back then, so you can get away with it.
  • Modern cars and the wrong fluids don’t mix:The reason why modern cars made after the 1970s and later are sensitive to mixing fluids is because they use advanced, lightweight materials, especially if we’re talking about cars made in the 1990s and after the turn of the millennium. . Transmission fluid in 1970s power steering systems will treat the substance like any other type of hydraulic fluid and will have no problem with its sticky, grip-increasing nature, since it works with fewer clunkier auto parts.
  • Specific Parts of Sophisticated Fluid Service:Adding transmission fluid to your 1970s power steering is like using a staple gun as a hammer. You can technically do that, but it’s more efficient to use a hammer and the stapler isn’t doing its intended job. Modern cars have more delicate parts and subtle engineering differences. Each of your systems requires fluids and oils specifically designed for these parts. Using the wrong fluid is asking for trouble, much like using a stapler as a hammer for softwood or particle board. You’ll break the wood before you can hammer the nail in!

Is power steering fluid exactly the same as transmission fluid?

In fact, you can. You can use ATF or programmed transmission fluid in your power control pump as a substitute for power guide fluid when you are in a tight spot. Both your ATF and power guide fluid are hydraulic fluids, and your power control frame is a hydraulic frame like your transmission system.

ATF benefits you by including cleansers in its formula that help keep your system clean. Many cars and trucks actually require ATF in their power steering siphon. Please read your vehicle manual carefully to verify if this is the situation for your make and model of car.

The legitimate fluid suggested by the manufacturer is not too expensive and you can buy the suggested fluid just as effectively as ATF. Be that as it may, after other options have been exhausted, you can substitute ATF instead.

  • Is power guide fluid just as old as transmission fluid? No, however they are a similar type of liquid. Both are pressure driven liquids. Actually, ATF has a red hue that has a pleasant smell. Meanwhile, the liquid that directs the power is pink, gold, or clear and smells like consumed marshmallows, all things considered. ATF, in any case, contains polish modifiers and cleaners to remove dirt and oil from the programmed transmission while also damaging the pump and control frame water-actuated valves.


  • Would you be able to put power steering fluid in your automatic transmission? Interestingly, yes and negative. In fact, since power steering fluid, like ATF, is a pressure-driven type of fluid, so it doesn’t like that you’re pumping your programmed transmission with alcohol or fuel or something horrible. No, since ATF is better than power steering fluid/oil in terms of its added substances. The power directing fluid needs cleaners that remove dirt and oil. It also has no erosion modifiers that are expected to keep excessive heat development in check.

Both work as lubricants.

They lubricate various auto parts, although both act as lubricants. The hydraulic clutch and brake, as well as the rest of the vehicle’s brake system, are powered by brake fluid. It works well as a lubricant and anti-corrosion for the moving parts of a car. To improve the performance of the vehicle’s power steering system and provide the driver with more control over the steering wheel, power steering fluid is used in the system. It is a low viscosity hydraulic fluid with excellent resistance to oxidation.



Are all power steering fluids the same?

No, power steering fluids vary greatly from one another. Understanding the many types and which one is best for your car is crucial. Automatic transmission fluid is used in a number of cars, as mentioned above; the most popular varieties are Dexron, Mercon, Type F and ATF+4. However, other types of synthetic fluids have also been created especially for use in power steering systems in newer automobiles.


However, you should only replace your power steering fluid with ATF in extreme circumstances. Friction reducers are a standard feature ofautomatic transmission fluid. As a result, using it as a substitute risked damaging thepower steering pump.


To understand the key differences between power steering fluid and transmission fluid, let’s take a closer look at each of them.


Power steering fluid is a form of hydraulic fluid that is used in the power steering system. This system requires less force to turn the steering wheel, especially when the car is stationary or driving at low speed.

If you’ve driven an older car without a power steering system, you’ll probably notice the difference. Is very remarkable. Fortunately, almost all new vehicles use the power steering system.

The function of the fluid is to act as the hydraulic conduit through which the system can exert force on the two front tires to make it easier for the driver to turn them. The fluid also has the added benefit of lubricating all the parts involved in the system, allowing them to function well and last longer.

In terms of physical appearance, power steering fluid is usually light red, orange, or pink in color. It can also be clear. It is recommended to replace the power steering fluid every five years or after 75,000 to 100,000 miles. For exact values, see manufacturer’s guidelines.


Transmission fluid is also a hydraulic fluid that fulfills the main function of lubricating the gearbox of the vehicle. This allows gear drives to run smoothly and efficiently, without any wear between internal components.

If the transmission fluid is bad in terms of its quality, or if there isn’t enough of it, the gearbox can wear out over time due to friction, and gear drives can feel rough and rough.

Transmission fluids last a long time. Often you don’t even have to worry about replacing them in the life of your car unless you see signs of gearbox or fluid deterioration.

Transmission fluid can be divided into a few main categories:

manual transmission fluid

As its name might suggest, this type of transmission fluid is used in most manual transmission systems involving a clutch and gear for manual shifts. It is used in older vehicles; Newer manual transmission vehicles are switching to using automatic transmission fluid for the added benefits it provides.

It is thicker than automatic transmission fluids and comes in darker colors, such as brown. Most mechanics recommend that you replace your manual transmission fluid every 30,000 to 60,000 miles.

Fun fact:Motor oil can be used as a manual transmission fluid. Although it is generally used to lubricate the engine, it has a somewhat similar set of properties to those required for manual transmission fluids.

Automatic Transmission Fluid (ATF)

Automatic transmission fluid is used in vehicles with an automatic transmission system. In addition to providing the aforementioned lubrication benefits, this fluid also assists the automatic transmission system in making gear changes with the help of hydraulic pressure. It also acts as a coolant and ensures temperatures don’t get too high.

It has a thinner consistency compared to manual transmission fluid and has a slight reddish hue in terms of color. However, manufacturers have recently started to introduce their own colors, such as green and blue, to make their products stand out. It is recommended to replace the ATF every 60,000 to 100,000 miles.

synthetic transmission fluid

This form of transmission fluid is usually ATF created synthetically in a laboratory through chemical reactions. It is more effective at lubricating, breaks down more slowly, is less likely to rust, and provides users with many other benefits.

To learn more about the benefits of synthetic transmission fluids, check out this article.

It can also be customized for specific vehicles. This category often offers the highest quality transmission fluid available.


First, it’s apparent that power steering fluid and transmission fluid are different for the most part. They have different properties, different roles, and different purposes. However, ATF, in particular, is a type of transmission fluid similar to power steering fluid.

Their similarity lies in the fact that both fluids are hydraulic fluids built to deliver pressure to a different area.

In fact, there are automatic transmission fluids that can be used as power steering fluids. Although usually not the other way around.

We hope the article about “is power steering fluid the same as transmission fluid?” and the related information is helpful to you. If you have any questions, please let us one on our website Auto Oil And Fluid!



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