A604 Fluid : The Ultimate Guide to Smooth Transmission Performance.

The proper functioning of your vehicle’s transmission depends on the optimum performance of its components, such as the A604 transmission fluid.

Without the proper viscosity, the transmission won’t send the right signals, and the engine won’t be able to deliver the necessary torque or power to the wheels.

A604 Transmission Fluid Type

ATF+3 is a synthetic-based fluid specially formulated to meet the demands of modern automatic transmissions.

It offers enhanced performance, protection, and lubrication to ensure the trouble-free operation of your vehicle over time.

A604 Transmission Fluid Capacity With Torque Converter

The A604 Torque Converter can hold 9 quarts of ATF+4, a synthetic transmission fluid also known as Mopar ATF+, recommended for use in this transmission type. 

How Much Fluid Does a A604 Transmission Hold? 

A604 transmissions can hold approximately 10.3 quarts of ATF+4 and 9.1 quarts of Torque Converter fluid.​​​​​​

It’s important to note that this is just a ballpark figure, and the fluid requirements may vary depending on the application.

How Many Quarts Of Transmission Fluid Goes In A A604? 

As mentioned above, the A604 transmission takes 9.1 quarts of ATF+4 and 9 quarts of torque converter fluid. 

A604 Transmission Fluid Check- How To

To check the transmission fluid level of your A604, you’ll need to start with a cold engine and shift the transmission into the park.

Raise the front of the vehicle off the ground, and with the engine running, remove the dipstick and check the fluid.

The fluid should be visible at the bottom of the dipstick and should be at the “Full” mark on the dipstick.

A604 Transmission Fluid Flow

The A604 transmission uses a combined electronic and computer-controlled hydraulic system.

Any time the mode switch (located on the end of the transmission shaft) is engaged, the computer sends signals to each shift valve to provide the necessary transmission pressure and modulation to the torque converter.

A604 Transmission Fluid Capacity Dry

Typically, the A604 transmission should carry a nominal capacity of 9.7 quarts of ATF+4.

However, the exact capacity of the transmission may vary depending on the year, make and model. 

A604 Transmission Fluid Temperature Sensor

The A604 transmission fluid temperature (TFT) sensor is responsible for measuring the temperature of the fluid inside the transmission.

The sensor will then send a signal to the PCM (Powertrain Control Module) to determine whether the transmission operates within the normal range.

A604 Transmission Fluid Change Interval

For optimal performance, it’s recommended to change the A604 transmission fluid regularly. This should be done every 40-60k for optimal results.

A604 Transmission Fluid Pressure Sensor

The A604 transmission fluid pressure sensor checks the fluid pressure in the transmission.

This sensor will send information to the PCM, which will then determine the necessary adjustments that need to be made to the transmission.

A604 Transmission Fluid Pressure Switch

The pressure switch for the A604 transmission fluid can be found on the transmission. It is the source of power for the transmission and should remain on for the system to work properly. When the switch is off, no power is sent to the transmission. 

Is Transmission Fluid Universal?

Yes, transmission fluid is universal. If your vehicle uses an A604 transmission fluid, use the correct type compatible with the A604 system.

What Color Is Atf Transmission Fluid?

Atf transmission fluid is typically dark red, which is one way to distinguish it from other types of transmission fluid.

This can be helpful when determining the type of transmission fluid you should be putting into your vehicle.

What Fluid Goes In The Transmission?

Generally, the transmission requires a lubricant to function properly. This lubricant typically comprises components such as castor oil, synthetic oil, or a combination of the two.

As a general rule of thumb, you should use the same fluid initially installed in the system to maintain optimal performance.

What Transmission Oil?

The type of transmission oil used in the A604 system is usually specified in the manufacturer’s manual.

It is usually a fully synthetic oil since it typically has a shorter interval for the oil change schedule. It is important to use the correct type of oil to avoid damage to your vehicle’s transmission system.

Can You Drain Transmission Fluid?

Yes, you can drain your transmission fluid. This can be done as part of a transmission service or as a general maintenance procedure.

Follow the manufacturer’s instructions and use a proper funnel to ensure you do not spill the fluid.

Can You Check Your Own Transmission Fluid?

Yes, you can check your transmission fluid on your own. Typically, you can check the fluid level by looking at the dipstick or by checking for leaks in the system. Use a clean rag or cloth to avoid any fluid contamination.

What Is Ap4 Transmission Fluid?

The AP4 transmission fluid is a type of transmission fluid used in vehicles equipped with the A604 transmission system.

It is a synthetic fluid with better oxidation and sludge protection than conventional fluids. It has also been designed to reduce foaming and fluid loss due to wearing.

What Is DW1 Transmission Fluid?

The DW1 transmission fluid is a specific type of transmission fluid that provides improved acceleration power and shifting stability.

It also contains a special additive that helps to reduce wear and corrosion. It is typically used in cars that have the A604 transmission system.

Understanding A604 Fluid And Its Role In Transmission Performance

What Is A604 Fluid?

A604 fluid is a type of transmission fluid that is primarily used in vehicles with a 4-speed automatic transmission called the ultradrive or a604 transmission.

This fluid is a hydraulic oil that serves as a lubricant to the transmission system, ensuring it functions correctly.

A604 fluid is highly specialized and has a unique chemical formulation designed to meet the specific needs of this type of transmission.

How Does A604 Fluid Affect Transmission Performance?

The performance of a transmission system depends on several factors, and the type of fluid used is one of them.

A604 fluid plays a vital role in ensuring the smooth operation of the transmission system. Here are some key ways in which a604 fluid affects transmission performance:

  • A604 fluid helps reduce friction, which helps the transmission system operate smoothly and efficiently.
  • The fluid maintains appropriate viscosity in both high and low temperatures, ensuring the transmission system is protected from wear and tear.
  • A604 fluid also provides corrosion protection for the transmission system’s internal components, such as gears, clutches, and bearings.
  • The fluid helps cool down the transmission system, preventing overheating and extending the lifespan of the transmission.

What Are The Benefits Of Using A604 Fluid For Transmission Performance?

Using a604 fluid has several benefits for the transmission system, which has a trickle-down effect on the vehicle’s overall performance.

Here are some benefits of using a604 fluid:

  • Better fuel efficiency: A604 fluid helps reduce friction in the transmission system, which translates to better fuel economy for the vehicle.
  • Longer lifespan: The fluid protects the internal components of the transmission system, reducing wear and tear and extending the lifespan of the system.
  • Improved shifting performance: A604 fluid maintains optimal viscosity, enabling smooth and precise gear shifting.
  • Reduced transmission noise: The fluid helps reduce vibration and noise in the transmission system, improving the overall driving experience.

A604 fluid is a specialized hydraulic oil that is essential for the proper functioning of the ultradrive or a604 transmission.

Using this fluid not only improves the performance of the transmission system but also benefits the vehicle’s overall performance.

It is crucial to use the recommended fluid to ensure your transmission operates efficiently and lasts for as long as possible.

A604 Fluid Types And Their Properties

A604 fluid is known for its excellent performance in transmissions and is suitable for many automatic transmission vehicles.

Transmission fluids are classified according to their viscosity index, which defines the fluid’s ability to withstand temperature changes.

Types Of A604 Fluids Available In The Market

A604 Fluid

There are two main types of a604 fluids available in the market today. These are:

  • Mineral-based fluids
  • Synthetic fluids

Comparison Of A604 Fluid Types And Their Properties

Here are some key differences between the two types of fluids:

  • Mineral-based fluids are cheaper than synthetic fluids. However, synthetic fluids last longer and are more resistant to high temperatures.
  • Mineral-based fluids may break down faster than synthetic fluids when exposed to heat stress.
  • Synthetic fluids provide better wear protection than mineral-based fluids and are generally recommended for high-performance applications.
  • Synthetic fluids are also known to improve fuel economy compared to mineral-based fluids.

What To Consider When Choosing A604 Fluid For Your Transmission

Choosing the right a604 fluid is crucial for the optimum performance of your transmission. Some key factors to consider include:

  • Your vehicle manufacturer’s recommendations: Most manufacturers specify the type of transmission fluid that should be used in their vehicles. Following these recommendations will ensure that your transmission runs smoothly.
  • Budget: Synthetic fluids are more expensive than mineral-based fluids. However, they last longer and offer better performance.
  • Operating conditions: If you operate your vehicle in extreme temperatures or heavy loads, you may need a synthetic fluid that provides better performance.
  • Maintenance: Some synthetic fluids require longer service intervals than mineral-based fluids. Check your vehicle’s owner manual for the recommended maintenance schedule.

Overall, getting the right a604 fluid for your vehicle’s transmission is essential for its optimum performance.

Consider your budget, operating conditions, and manufacturer’s recommendations before making a decision on which fluid to use.

How To Change A604 Fluid

YouTube video

When To Change A604 Fluid

The a604 transmission is a four-speed automatic overdrive transaxle used in several chrysler vehicles.

Like every other vehicle component, the a604 fluid requires periodic replacement to keep it performing optimally.

Here are a few telltale signs you should look out for before changing a604 fluid:

  • If you notice a burning smell emanating from the transmission
  • If you observe the fluid to have lost its bright red color or become dark brown
  • If there is difficulty in shifting gears or the gears slip
  • If the transmission makes unusual noises such as grinding or whining sounds

Tools Needed To Change A604 Fluid

To replace your a604 transmission fluid, you need to have the following tools:

  • A funnel
  • A fluid transfer pump
  • A socket wrench set
  • A replacement a604 fluid
  • A drain pan
  • A jack and jack stands

Steps To Follow When Replacing A604 Fluid

  • Firstly, find a level ground and position your jack under the car. Raise the car and use the jack stands to hold the weight.
  • Locate the transmission’s drain plug under the car. Place the drain pan beneath the plug and unscrew the drain plug with a socket wrench to drain the fluid. Once the fluid has finished draining, reattach and tighten the plug again with the socket wrench.
  • Now locate the transmission dipstick, remove it and insert your fluid transfer pump tube to the bottom of the pan.
  • Next, with your new fluid ready, pump the fluid into the transmission pan slowly until it reaches the “add” mark on the dipstick. Replace the dipstick and check the fluid level after running the engine for a while.
  • Remember to add an equal amount of a604 fluid that you drain out. So, if you drain out five quarts, you need to replace it with five quarts of new fluid to keep the system at maximum capacity.

That’s it! By following these simple steps and the right frequency, you can keep up the longevity of your a604 transmission fluid and avoid costly repairs.

A604 Fluid Maintenance And Troubleshooting

When it comes to maintaining and troubleshooting a604 fluid, it’s essential to understand that proper maintenance is crucial in preventing costly transmission problems.

Here are some essential practices to maintain and avoid transmission problems:

Practices To Maintain And Avoid Transmission Problems:

  • Follow manufacturer recommendations: Always consult the manufacturer’s manual to follow their recommendations for regular fluid change intervals, as it varies depending on the vehicle make and model.
  • Use the right type of fluid: A604 fluid is unique and not interchangeable with other fluids. Ensure you use the manufacturer-specified a604 fluid, as using other fluids could lead to various transmission issues.
  • Check fluid levels: Regular monitoring of fluid levels can help identify potential leaks or low fluid levels that could cause transmission problems.

Here are some signs you should look for if you suspect that your a604 fluid causes transmission problems:

Signs Of Transmission Problems Caused By A604 Fluid:

  • Burning smells: A burning smell could indicate the transmission is overheating, and the a604 fluid might require a flush and replacement.
  • Leaks: Leaks can occur in the transmission system, and if left unattended, they could lead to low fluid levels that damage the transmission.
  • Slipping gears: Slipping gears could be caused by contaminated a604 fluid or low fluid levels. Replacing or refilling the fluid could solve the problem.

If you suspect that you have transmission problems caused by a604 fluid, it’s essential to troubleshoot immediately. Here’s how:

How To Troubleshoot Transmission Issues Caused By A604 Fluid:

  • Conduct a visual inspection: Examine the transmission and related parts for damage, leaks, or other irregularities.
  • Run diagnostic tests: Use diagnostic tools to check the transmission fluid pressure, sensor readings, and other system parameters.
  • Seek professional help: If you are unsure about troubleshooting procedures or have in-depth transmission problems, it’s best to seek professional help.

Regular maintenance of a604 fluid is crucial in ensuring smooth transmission operation.

By following manufacturer recommendations, checking fluid levels, and using the right type of fluid, you can prevent transmission problems.

If you notice any signs of transmission problems, troubleshoot immediately to avoid costly repairs.

Frequently Asked Questions Of A604 Fluid

1. What Is A604 Fluid Used For?

A604 fluid is used as automatic transmission fluid for chrysler cars.

2. How Often Should You Change A604 Fluid?

It is recommended to change a604 fluid every 30,000 to 60,000 miles.

3. What Are The Benefits Of Using A604 Fluid?

A604 fluid improves transmission performance, reduces wear, and extends the lifespan of the transmission.

4. Can You Use Any Type Of Transmission Fluid In A604?

No, it is important to use only a604 fluid or other fluids recommended by the manufacturer to avoid damage to the transmission.

5. How Much A604 Fluid Should I Add?

The amount of a604 fluid to add depends on the specific chrysler model. Refer to the owner’s manual for the correct amount.

6. Is It Difficult To Change A604 Fluid?

It is recommended to have a professional mechanic change a604 fluid. A typical change involves flushing and replacing about 8 quarts of fluid.

Read More About: Can Burnt Transmission Fluid Cause Slipping?


The A604 transmission fluid is vital to your vehicle’s power transfer system. Make sure to use the correct fluid type, check the fluid level regularly, and follow the manufacturer’s recommended maintenance schedule to ensure your vehicle’s transmission system remains in optimal condition.

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