How to Check and Change Your Chevrolet Impala Transmission Fluid?

By Nick Marchenko, PhD

A fluid exchange and a transmission flush are comparable yet distinct, much like a turtle and a tortoise or a malt and a milkshake.

Let's take a closer look at these two services, how they contribute to your Chevrolet Impala's efficient operation, and what you can anticipate paying for each.

Examining the Transmission Fluid Exchange in More Detail

The fluid exchange empties the fluid from the pan, while the flush removes and replaces the ATF in the torque converter, cooler lines, and pan. Here is the typical procedure:

• The vehicle is tested first. The ATF will get heated enough to operate normally. As a result, the car is then elevated using a lift to provide access to the transmission pan.
• To drain the ATF, either the entire transmission pan or simply the drain plug can be removed. The pan should be removed so that a detailed inspection can be made for issues like sludge and dirt.
  After a complete cleaning, before reattaching the transmission pan drain plug, the filter and gasket should be changed.
• The transmission will now receive fresh ATF. Make sure the appropriate volume and type of fluids are utilized.
  Consult your owner's handbook or inquire with a qualified technician if you are unsure which ATF is recommended for your vehicle.
• To the used ATF, about 5 to 8 quarts still present in the torque converter, this fresh fluid will be poured. When the engine is started, the old and fresh fluid will mix.
• After changing the gearbox fluid, the automobile must be driven. The demonstration drive ensures:
  • The transmission is correctly shifting.
  • ATF leaks do not exist.
  • The warning indicator lights on the dashboard are turned off.
  • The transmission may have issues that need further attention if it grinds or makes other noises during the test drive.

Many drivers choose to do a Chevrolet Impala transmission flush themselves. Since changing the transmission fluid on most automobiles is simple, many drivers find that doing it DIY is an excellent way to save money.

Remember, you need the appropriate tools for the work, and a transmission fluid swap might be a dirty process. Before you decide to DIY:

• Most automatic gearboxes lack drain plugs, so some of the pan bolts must be removed with the ATF still inside.
• It is essential to have a sizable catch pan to pour the old fluid into.
• Any ATF spills can be cleaned up with a bag of clay cat litter.
• If something seems too complicated or time-consuming, there are companies that can assist. Just bring your car in and let qualified mechanics handle the rest.

Factors Affecting Transmission Fluid Change Cost

This procedure typically costs between $80 and $250. Why such a broad spectrum? Your response to the following questions will determine:

• Who is going to provide the service?
• Will you be doing this yourself, or are you taking your car to a dealership, a lube store, or an independent business? You will pay labor charges if a professional handles it.
• What year and type of automobile do you drive? ATF that is required for many modern vehicles can be pricey.
• Will the transmission be filled with a specific amount of ATF?
• Do you replace the pan gasket and filter at the same time?

Transmission Flush vs. Exchange at a Glance

Transmission flush and transmission exchange are both maintenance procedures that can help improve the performance and lifespan of your car's transmission. However, there are some key differences between the two procedures.

A transmission flush involves replacing the old fluid with fresh fluid. The old fluid is drained from the transmission, and then fresh fluid is pumped in. This helps remove any dirt, debris, or contaminants that may have accumulated in the transmission fluid over time.

How Does a Transmission Fluid Flush Service Work?

A test drive is done first. This aids the professional in identifying and diagnosing any issues that require attention during service. The transmission is then checked for any visible signs of problems or leaks.

Method for flushing a cooler

The lines from the transmission to the cooler will be disconnected and connected to the flush machine. This allows the movement of ATF to and from the flush machine.

The ATF is circulated during the transfer process, using the pressure that the transmission pump generates. In this way, the system's core components are not damaged.

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The ATF flows exactly as it would in a normal working environment. The only difference is that the outgoing old ATF is held for recycling, while the incoming ATF is fresh.

This method, despite being widely used, has drawbacks:

• Some of the ATF may end up in the pan rather than the cooler due to how the unit cycles through the fluid.
• Not all of the old ATF is replaced; instead, the new ATF is used to continually dilute it.

Pump inlet flush method

ATF is transferred through the transmission and into a drain hole, flushing the entire system. New ATF is added once the system has been cleansed.

This method, while more thorough than the cooler flush method, also has drawbacks:

• It requires that the pan and filter be removed and replaced.

• It needs a couple of extra gallons of ATF.
• Since it takes longer to complete, the pump inlet flush method could be more expensive.

The price range for a transmission fluid flush service is between $125 and $250. This costs almost twice as much as changing the transmission fluid.

This is primarily due to the extra fluid needed. A fluid change requires 5 to 7 quarts, whereas a flush requires 12 to 22 quarts.

The best procedure for you will depend on the condition of your transmission and your budget. If your transmission is in good condition and you're looking for a less expensive option, then a transmission flush may be sufficient.

However, if your transmission is in poor condition or you want the most effective cleaning possible, then a transmission exchange may be a better option.

It is always a good idea to consult with a qualified mechanic to get their advice on whether a transmission flush or transmission exchange is right for your Chevrolet Impala.

Nick Marchenko, PhD

Industrial Engineer & Automotive Content Specialist

Nick writes in-depth guides on car clubs, engine specs, vehicle ownership, and modifications, combining engineering knowledge with automotive passion.

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