How often should you change the transmission fluid in a 2017 Ford Explorer?

In most normal driving conditions, Ford’s official maintenance guidance for the 2017 Explorer does not require a routine transmission fluid change at a fixed interval. Many drivers choose to change the fluid as preventive maintenance based on mileage and usage, typically around 60,000 to 100,000 miles, especially under severe service. Always verify with your owner’s manual or a Ford dealer for your exact VIN.

Ford's official guidance for the 2017 Explorer

These points summarize what Ford generally communicates about automatic transmission servicing for the 2017 Explorer. An explicit, fixed mileage interval is not always specified for normal driving, and fluid type matters a lot.

• The automatic transmission fluid (ATF) specification for many 2017 Explorers is Mercon LV; use the fluid recommended by Ford for your vehicle’s transmission.


• For routine maintenance under normal driving, Ford’s published schedules often do not require a regular ATF change interval as part of standard service.


• ATF changes are typically advised if there is a problem, such as a leak, overheating, contamination, or a dealer-identified need based on VIN-specific service data.


• If you opt to change the fluid as preventive maintenance, many drivers consider doing so around 60,000 miles for severe-duty use or up to 100,000 miles under typical conditions, always using the correct fluid and following proper service procedures.

In practice, the best approach is to consult your owner’s manual or a Ford dealership for your specific VIN, since schedules can vary by model year, transmission type, and regional requirements.

Practical considerations for owners

Beyond the official guidance, practical decisions depend on how you drive and where you live. The following factors help determine whether a transmission fluid change makes sense—and when to schedule one.

• Vehicle usage: frequent towing, all-terrain driving, or extreme hot/cold climates can justify more frequent fluid checks or changes.


• Maintenance history: if the vehicle has a known transmission issue or past overheating problems, a preventive fluid change may be prudent.


• Climate and environment: high-temperature operation or dusty, dirty conditions can affect fluid life and system cleanliness.


• VIN-specific advice: some 2017 Explorers may have service notes tied to their factory data; confirm with a dealer for your exact build.

Bottom line: while not required on a strict schedule for many drivers, assessing your conditions and sticking to a VIN-based plan from a Ford dealer offers the most reliable path to transmission health.

Choosing the right fluid and service method

Using the correct ATF and applying the appropriate service method are critical to preserving transmission performance and warranty considerations. Ford typically specifies Mercon LV for many 6-speed automatics used in the Explorer line of that era.

When performing a fluid change, you may choose between a drain-and-fill or a full flush. A drain-and-fill is generally gentler on the system and more commonly recommended by service professionals to reduce the risk of introducing debris back into the valve body. Always follow the manufacturer’s procedure for your VIN, and use the exact fluid specification prescribed by Ford.

Signs you may need a transmission fluid service

If you notice any of these symptoms, it could indicate that the transmission fluid needs attention or replacement. Do not ignore these warning signs, as they can indicate broader transmission issues.

• Smoothness: slipping, delayed engagement, or harsh/shuddering shifts.


• Overheating feel: the transmission temperature light or a feeling of overheating during operation.


• Fluid condition: ATF that is dark, burnt-smelling, or contains metal shavings or debris.


• Warning lights: transmission fault or service lights appearing on the dash.


• Unusual noises or performance changes: clunking, grinding, or abnormal vibrations during gear changes.

If any of these issues are present, have the vehicle inspected by a qualified technician who can check fluid condition, leaks, and the need for a replacement or further diagnostics.

Summary

For a 2017 Ford Explorer, there is no universal fixed interval published for routine automatic transmission fluid changes in normal driving conditions. Use Mercon LV as specified, and rely on VIN-specific guidance from Ford or your dealer. If you tow often, operate in extreme climates, or have a high-mileage vehicle with a history of transmission problems, scheduling a preventive fluid change between 60,000 and 100,000 miles is a reasonable precaution. Always consult the owner’s manual or a Ford dealership for your exact vehicle’s requirements, and consider a drain-and-fill over a full flush unless a technician recommends otherwise.

Is 100,000 miles too late to change transmission fluid?

No, it is not bad to change transmission fluid after 100,000 miles, and in most cases, it's recommended, especially if you've never done it before. The main risk is that old, dirty fluid can contain debris that might clog up passages if flushed aggressively, but this can be mitigated by opting for a "drain and fill" method instead of a full-system flush, which is safer for high-mileage transmissions. Always check your owner's manual for the specific recommendations for your vehicle. 
This video explains the potential risks and benefits of changing transmission fluid in a high-mileage vehicle: 58sChrisFixYouTube · Apr 9, 2016
Why it's a good idea to change the fluid

• Protects the transmission: Over time, transmission fluid degrades due to heat and usage, losing its ability to lubricate and cool the transmission. 
• Removes contaminants: The fluid circulates and picks up clutch material and other debris. Changing it removes these contaminants that can cause sludge buildup and clogs. 
• Prevents overheating: Clean fluid helps prevent the transmission from overheating, which can shorten its lifespan. 

How to change it safely

• Check the owner's manual: The manual is the most accurate source for your specific vehicle's recommended interval. 
• Choose "drain and fill": This method involves draining the old fluid and replacing it with new fluid, which is safer for high-mileage transmissions than a complete system flush. A full flush can dislodge a large amount of debris at once, which could be problematic. 
• Consult a professional: If you're unsure or if the fluid looks very dark, burnt, or contains metal flakes, it is best to have a qualified mechanic assess the transmission and perform the service. They can determine if a drain-and-fill is appropriate or if other services are needed. 

This video demonstrates how to perform a transmission fluid change: 59sScotty KilmerYouTube · Jun 9, 2021
When to be extra cautious

• If you have a history of neglect: If your car has never had its transmission fluid changed, the fluid is likely very dirty. A gradual drain and fill is the recommended approach to minimize risk. 
• If the transmission is already showing issues: If you are already experiencing shifting problems, trouble shifting gears, or strange noises, changing the fluid may not fix the problem and could even make it worse, so it's best to have a mechanic inspect it first. 

Does Ford recommend transmission fluid change?

Most newer models: Every 60,000 to 100,000 miles. Older models: Every 30,000 to 50,000 miles.

How many years does transmission fluid last on a Ford?

It's recommended to get your transmission fluid changed once every 30,000 to 60,000 miles-or, once every two to four years. However, this is just the suggestion for the average driver.

How often should I change the transmission fluid on my 2017 Ford Explorer?

Every 30,000 to 60,000 miles:
Inspect and possibly replace PCV valve. Flush and replace coolant. Inspect and possibly replace transmission fluid and filter. Inspect and possibly replace differential fluid.