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What kind of transmission fluid goes in a 2005 Ford Explorer?

The majority of 2005 Ford Explorers equipped with the 5R55S five‑speed automatic use Mercon V transmission fluid. Always verify your exact transmission type in the owner’s manual or by checking the transmission tag, because variations can exist within a model year.

Using the correct ATF is important for smooth shifting and long‑term reliability. If you’re planning a drain and fill or a full flush, double‑check the specification for your specific vehicle before purchasing fluid.

Understanding the transmission in a 2005 Explorer

Most 2002–2005 Explorers with the 4.0L V6 were equipped with the 5R55S automatic transmission. This transmission is designed to run on Mercon V, Ford’s modern ATF, to maintain proper shift quality and protection. Because Ford’s production mixes can vary by region or build, it’s worth confirming the exact transmission model code on the vehicle if you’re unsure.

To avoid mis‑matches, start by identifying the transmission model code and consulting the owner’s manual or Ford’s official service literature. The transmission code can be found on a tag on the trans itself or in service documents related to your vehicle.

Recommended transmission fluid

Below is the core fluid recommendation for the typical 5R55S automatic used in many 2005 Explorers.

Mercon V: Ford’s modern automatic transmission fluid, recommended for the 5R55S in the 2005 Explorer. It is a synthetic blend designed to meet the needs of this transmission family.

Conclusion: opt for Mercon V from a reputable brand or Ford’s official Mercon V to ensure compatibility with the 5R55S. If you plan a fluid change, consider professional service to ensure the proper amount and to replace the transmission filter if applicable.

How to verify and service the transmission fluid

Because Ford sometimes used different transmissions in the same year, it’s important to confirm your exact transmission type before purchasing fluid. The steps below help you verify compatibility and plan a service.

Check the owner’s manual or Ford’s official service documentation for the exact ATF specification for your vehicle’s transmission code (most cars in this range use 5R55S).

Inspect the transmission identification tag or service records to confirm the correct fluid type before buying or draining fluid.

Conclusion: when in doubt, use Mercon V and consult a dealer or qualified technician if you’re unsure about your vehicle’s exact transmission configuration.

Summary

For a typical 2005 Ford Explorer with the 5R55S automatic, Mercon V is the recommended transmission fluid. Always confirm the transmission type via the owner’s manual or a service tag, and consult a Ford dealer or reputable shop if you’re unsure. Using the correct ATF helps maintain smooth shifting and long‑term reliability.

What type of transmission fluid does a Ford Explorer take?

The Ford Explorer transmission fluid type varies by model year, with common specifications including Mercon LV for newer models (approx. 2011-present with 6-speed automatics) and Mercon V for older models. For other model years, Mercon SP or other specific fluids may be required. Always check your owner's manual or the vehicle's specific transmission tag to confirm the exact fluid specification for your vehicle.
Common transmission fluid types by model year

Newer Models (approx. 2011-present, 6-speed automatics): Mercon LV is the required fluid for many newer Explorers with 6-speed automatic transmissions.
Older Models (approx. 1997-2010): Mercon V is the correct specification for many older models.
Other Fluids: Some models may require different fluids, such as Mercon SP for certain 2006-2008 models, or other specific fluids depending on the transmission.

How to find the correct fluid

Check your owner's manual: This is the most reliable source for determining the correct transmission fluid type for your specific vehicle.
Look for a tag on the transmission: The transmission itself may have a tag indicating the correct fluid type.
Consult a parts professional: If you can't find the information, a parts professional can help you determine the correct fluid based on your vehicle's year, make, model, and engine size.

What transmission fluid does Ford recommend?

The correct Ford transmission fluid type depends on your vehicle and its transmission, but the most common types are the Mercon family (Mercon LV, ULV, V) and Type F, which is for older vehicles. Always check your owner's manual or the vehicle's dipstick to ensure you use the correct specification, as using the wrong fluid can cause serious damage.

Common Ford transmission fluid types

Mercon LV (Low Viscosity): This is the fluid for many modern Ford automatic transmissions, including select F-150s and Explorers, as noted by Walmart and Valvoline.
Mercon V: Recommended for older Ford automatic transmissions and can be found in models like the 2006-2009 F-150 and 2006-2008 Escape, according to Walmart.
Mercon ULV (Ultra Low Viscosity): Used in specific newer transmissions, such as the AW F21 6-speed transmission.
Type F: A specialty fluid for older Ford automatic transmissions from the 1970s and earlier, or some power steering systems built before the late 1990s, as noted by Amazon and Valvoline.
Type CJ: A specialty fluid for specific transmissions like the Ford C-6.

Important considerations

Always check your owner's manual: This is the most reliable source for the correct fluid type.
Look for licensing: For Mercon fluids, make sure they have a license number issued by Ford, which ensures quality. Avoid products that only say "similar to".
Use genuine Motorcraft fluids: Using fluids recommended by Ford is the safest option, especially with newer, more complex transmissions.

What kind of transmission fluid for a 2005 Ford Explorer?

Mercon V Automatic Transmission Fluid
FRAM – FRAM Mercon V Automatic Transmission Fluid, 1 Quart (Part No. F450) FRAM Mercon V ATF is for use in Ford vehicle transmissions and transaxles.

How many quarts of transmission fluid does a 2005 Ford Explorer take?

The 2005 Ford Explorer transmission fluid capacity depends on the transmission model, but the 5R55S (5-speed) has a total fill of approximately 12.7 quarts. If you are only draining and refilling, the capacity is about 5 to 7 quarts for the 5R55S, while the 5R55E (4WD) needs about 9.8 liters and the 5R55E (RWD) needs about 9.5 liters for a total fill.
This video demonstrates how to fill the transmission fluid on a Ford Explorer 5R55S: 55sPlatinum ProductionsYouTube · Apr 29, 2022
5R55S (5-speed)

Total fill: 12.7 quarts
Drain and refill: Approximately 5 to 7 quarts
Fluid type: MERCON V is the correct fluid for this transmission

5R55E

4WD Total fill: 9.8 liters (about 10.4 quarts)
RWD Total fill: 9.5 liters (about 10 quarts)
Fluid type: MERCON V is the correct fluid for this transmission

Important considerations

Always check the dipstick: After refilling, start the engine and let it run for a few minutes to circulate the fluid. Then, check the fluid level with the transmission in park and the engine idling. Add more fluid as needed to reach the correct level.
Use the correct fluid: It is crucial to use the recommended transmission fluid, which is MERCON V.
Manual reference: Always refer to your owner's manual for the most accurate specifications for your specific vehicle.

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.