2017 Ford Explorer 4WD Sport – A Complete Guide To Performance
The 2017 Ford Explorer Sport is a powerhouse SUV that blends a twin-turbocharged EcoBoost engine with a sophisticated intelligent 4WD system. This guide provides expert insights into maintaining its performance, addressing common mechanical pain points like the PTU, and optimizing it for both daily commutes and off-road adventures.
You probably bought your SUV because you wanted a vehicle that could handle the school run during the week and a mountain trail on the weekend. It is a frustrating feeling when a “Check Engine” light or a strange smell from the drivetrain threatens those plans.
I promise to walk you through the essential maintenance and troubleshooting steps that every owner should know. We will cover everything from fluid changes to the nuances of the 2017 ford explorer 4wd sport terrain management system so you can drive with total confidence.
In this guide, we will explore the 3.5L EcoBoost engine, the critical “lifetime” fluids that actually need changing, and how to spot trouble before it leaves you stranded. Let’s get under the hood and see what makes this machine tick.
The Heart of the Beast: The 3.5L Twin-Turbo EcoBoost
The standout feature of the 2017 ford explorer 4wd sport is undoubtedly the engine. Unlike the base models, the Sport trim comes standard with the 3.5L EcoBoost V6, delivering 365 horsepower and 350 lb-ft of torque.
This engine uses twin turbochargers to provide low-end grunt, which is perfect for passing on the highway or pulling a trailer. However, turbochargers generate immense heat, which means your choice of oil and cooling efficiency is more critical than on a naturally aspirated engine.
To keep these turbos spinning happily, you must stick to a strict synthetic oil regimen. Synthetic oil resists breaking down under high temperatures, preventing the “sludge” that can clog oil feed lines and lead to expensive turbo failure.
Direct Injection and Carbon Buildup
Because this engine uses Direct Injection (DI), fuel is sprayed directly into the combustion chamber rather than over the intake valves. While this improves power, it means the valves aren’t “washed” by gasoline, leading to carbon buildup over time.
If you notice a rough idle or a slight loss in fuel economy, carbon deposits on the intake valves might be the culprit. Many DIYers use a specialized intake valve cleaner spray every 10,000 miles to help mitigate this common EcoBoost issue.
Regularly “stretching the legs” of the vehicle on the highway can also help. Sustained higher temperatures during a long drive can sometimes help burn off minor deposits before they become a significant restriction.
Maintenance Essentials for the 2017 ford explorer 4wd sport
Maintaining a performance-oriented SUV requires more than just the occasional car wash. To ensure your 2017 ford explorer 4wd sport remains reliable, you need to look beyond the basic dealership service schedule.
The Sport trim puts extra stress on the drivetrain due to its higher torque output. This means components like the transmission and the 4WD system require more frequent inspections than a standard front-wheel-drive Explorer.
Here is a quick checklist of the fluids and filters you should monitor closely:
- Engine Oil: Use 5W-30 Full Synthetic; change every 5,000 miles.
- Transmission Fluid: Perform a drain and fill every 30,000 to 45,000 miles.
- Engine Air Filters: Check every 10,000 miles, especially if you drive in dusty off-road conditions.
- Cabin Air Filter: Replace annually to keep the dual-zone climate control smelling fresh.
- Spark Plugs: EcoBoost engines are hard on plugs; replace them every 30,000 to 40,000 miles for peak performance.
Choosing the Right Spark Plugs
When replacing spark plugs, always use the Iridium-tipped variants recommended by the manufacturer. These plugs can handle the high-pressure environment of a turbocharged cylinder without blowing out the spark.
Ensure you check the “gap” of the plugs before installation, even if they are marketed as “pre-gapped.” A gap that is too wide can cause a misfire under heavy acceleration, which is a common complaint among Sport owners.
Applying a tiny amount of anti-seize to the threads can prevent the plugs from getting stuck in the aluminum cylinder head. However, be careful not to over-torque them, as the threads are delicate.
Addressing the PTU: The Most Critical Component
If there is one thing that keeps 2017 ford explorer 4wd sport owners up at night, it is the Power Transfer Unit, or PTU. This is the gearbox that sends power from the front-mounted transmission to the rear wheels.
Ford originally marketed the PTU fluid as “lifetime,” but many enthusiasts and mechanics disagree. The PTU sits very close to the exhaust manifold, which causes the small amount of oil inside to cook and turn into a thick, black paste.
If the fluid degrades completely, the internal gears can shear, leading to a total failure of the 4WD system. This is often preceded by a “propane” or “burnt oil” smell inside the cabin after a long drive.
How to Service the PTU
The 2017 model usually features a drain plug, which makes servicing much easier than in earlier years. You should aim to change the PTU fluid every 20,000 to 30,000 miles to prevent overheating.
You will need a high-quality 75W-140 Full Synthetic Gear Oil. Because the unit only holds about 18 to 24 ounces of fluid, it doesn’t take much to keep it fresh and lubricated.
If your PTU does not have a drain plug, you will need a suction pump to extract the old fluid through the fill hole. It is a messy job, but it is much cheaper than the $2,000+ cost of replacing the entire unit.
Mastering the Terrain Management System
The 2017 ford explorer 4wd sport is equipped with an Intelligent 4WD system that features a Terrain Management dial. This allows you to “tell” the car what kind of surface you are driving on so it can adjust the throttle and braking.
Unlike old-school 4×4 systems with a heavy transfer case, this system uses electronics to manage traction. Understanding these modes is the key to not getting stuck when the pavement ends.
- Normal Mode: Best for everyday dry pavement; biases power to the front wheels for fuel efficiency.
- Mud/Ruts Mode: Allows for more wheel spin and aggressive throttle response to keep momentum.
- Sand Mode: Holds gears longer and sends maximum torque to the wheels to prevent digging in.
- Grass/Gravel/Snow Mode: Softens throttle response and encourages early upshifts to prevent slipping.
Using Hill Descent Control
Your Sport model also features Hill Descent Control, which is essentially cruise control for steep off-road grades. You activate it via the button in the center of the terrain dial.
Once active, you can take your feet off the pedals and let the car manage the braking for each individual wheel. This prevents the vehicle from sliding sideways on slippery or loose descents.
Keep in mind that this system is designed for low speeds. If you exceed roughly 20 mph, the system will disengage, and you will need to take over manual braking immediately.
Suspension and Braking: The Sport Difference
The Sport trim isn’t just about a faster engine; it also features a heavy-duty suspension and larger brakes. The springs and dampers are tuned to be stiffer than the XLT or Limited trims.
This stiffness reduces body roll in corners, making the large SUV feel much more nimble. However, it also means that suspension components like bushings and strut mounts can wear out faster if you frequently drive on rough roads.
If you hear a “clunking” sound when going over speed bumps, check your sway bar end links first. These are relatively inexpensive parts that are easy to replace with basic hand tools in your driveway.
Brake Upgrades for Towing
The 2017 ford explorer 4wd sport comes with larger front rotors than the base models, but it is still a heavy vehicle. If you plan on towing a 5,000-pound trailer, you might want to consider upgraded brake pads.
Ceramic or semi-metallic pads designed for heavy-duty use can offer better “bite” and resist brake fade during long downhill stretches. Always pair new pads with a fresh brake fluid flush to ensure there is no moisture in the lines.
When working on the rear brakes, remember that this vehicle has an electronic parking brake. You must put the car into “Maintenance Mode” via the dashboard menu before compressing the rear calipers, or you will damage the electronic motor.
Common Problems and Troubleshooting
While the 2017 model is generally robust, there are a few “quirks” that owners should be aware of. Being proactive can save you from a massive repair bill down the line.
One notable issue is the internal water pump. On the 3.5L EcoBoost, the water pump is driven by the timing chain and is located inside the engine. If it leaks, it can dump coolant directly into the oil pan.
Check your oil dipstick regularly. If the oil looks like “chocolate milk,” stop driving immediately. This indicates coolant contamination, which will destroy the engine bearings in a matter of miles.
- Exhaust Smell: Often caused by cracked exhaust manifolds or leaking seals in the rear liftgate.
- Wheel Bearing Noise: A humming sound that changes with vehicle speed usually indicates a failing hub assembly.
- Sync 3 Glitches: If your infotainment screen freezes, try a “soft reset” by holding the Power and Seek Up buttons simultaneously.
The Infamous Manifold Crack
The EcoBoost engines are known for occasionally warping or cracking the exhaust manifolds due to the high heat of the turbos. You will hear a “ticking” sound that is most prominent when the engine is cold.
As the metal heats up and expands, the gap often closes, and the noise disappears. However, leaking exhaust gases can reduce turbo efficiency and introduce fumes into the cabin.
Replacing the manifolds is a labor-intensive job because the turbos must be removed first. If you are a DIYer, set aside a full weekend and make sure you have plenty of penetrating oil for those stubborn exhaust bolts.
Frequently Asked Questions About 2017 ford explorer 4wd sport
What is the towing capacity of the 2017 Ford Explorer Sport?
When properly equipped with the Class III towing package, the Sport trim can tow up to 5,000 pounds. Always ensure your trailer has functioning electric brakes, as the SUV’s weight alone makes stopping a heavy load difficult.
Does the 2017 Ford Explorer Sport require premium fuel?
While it will run on 87 octane, Ford recommends 91 octane or higher for the best performance. Using premium fuel allows the engine computer to advance the timing, giving you the full 365 horsepower and better fuel economy under load.
How often should I change the transmission fluid?
Despite the manual suggesting longer intervals, most experts recommend a fluid exchange every 30,000 to 50,000 miles. This is especially important for the Sport model, which generates more heat through its high-torque drivetrain.
Is the 4WD system always on?
Yes, the system is “always-active,” but it is front-wheel biased. The computer constantly monitors wheel slip and can send up to 100% of the available torque to the rear wheels in milliseconds if it detects a loss of traction.
Final Thoughts for the DIY Owner
Owning a 2017 ford explorer 4wd sport is a rewarding experience if you stay ahead of the maintenance curve. It offers a level of performance that few other three-row SUVs in its price bracket can match.
Remember that the key to longevity with this specific vehicle is fluid management. Don’t believe the “lifetime” fluid myths; change your oil, PTU fluid, and transmission fluid regularly to keep the mechanical components happy.
Whether you are upgrading the brakes for a cross-country trip or just doing a Saturday morning oil change, take your time and use quality parts. This SUV was built to work hard, and with the right care, it will serve you for many miles to come.
Stay safe, keep your tools sharp, and enjoy the drive!
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