2017 Convertible Ford Mustang – A Complete Ownership Guide
The 2017 S550 Mustang offers a perfect blend of modern independent suspension and classic muscle car aesthetics. This guide covers everything from caring for the multi-layer insulated cloth top to maximizing the performance of the EcoBoost or GT powerplants.
Owning a sports car is about more than just speed; it is about the connection between the driver, the machine, and the open road. If you have recently buckled into a 2017 convertible ford mustang, you know that the experience of dropping the top on a coastal highway is hard to beat. However, maintaining that experience requires a specific set of DIY skills and a proactive approach to automotive care.
In this guide, we will dive deep into the technical nuances of the 2017 model year, focusing on the S550 platform’s unique requirements. Whether you are troubleshooting a stubborn top motor or looking to sharpen your handling, we have the expert insights you need. Let’s ensure your pony car stays in peak condition for years to come.
From engine bay basics to the intricate hydraulics of the roof, we will provide actionable steps to keep you on the road. We will also look at common pitfalls that catch many owners off guard. By the end of this article, you will have a comprehensive maintenance roadmap tailored specifically for your convertible.
Understanding the Core Specs of the 2017 Convertible Ford Mustang
The 2017 model year was a “sweet spot” for the S550 generation, offering refined interior materials and the proven 6-speed transmissions before the 10-speed rollout. Owners typically chose between the 2.3L EcoBoost four-cylinder or the 5.0L Coyote V8, both of which offer distinct driving dynamics. The convertible chassis includes additional bracing to compensate for the lack of a fixed roof, which slightly increases the curb weight.
One of the standout features of the 2017 convertible ford mustang is the independent rear suspension (IRS). This was a massive leap forward from the old live-axle setups, providing much better mid-corner stability and ride quality. For the DIY mechanic, this means more complex bushings and control arms to inspect, but the payoff in handling is well worth the extra effort.
Inside the cabin, the Sync 3 infotainment system became standard on higher trims, offering a much faster interface than previous years. When working on your car, always remember that the convertible uses a different interior lighting and audio wiring harness than the fastback. This is a crucial detail if you plan on upgrading your sound system to compete with wind noise at highway speeds.
The EcoBoost vs. The GT: Maintenance Differences
The 2.3L EcoBoost is a turbocharged powerhouse that requires high-quality full synthetic oil to protect the turbo bearings. Heat soak can be an issue during spirited summer drives, so checking your coolant levels and radiator fins is a monthly requirement. We recommend using 5W-30 weight oil for the EcoBoost to provide better protection under boost.
The 5.0L GT, on the other hand, is a high-revving naturally aspirated beast that demands 5W-20 oil and a massive 8-quart capacity. Because the V8 produces significant vibration and heat, you should regularly check the motor mounts and exhaust hangers. Pro tip: Always use a Motorcraft FL-500S filter to ensure the correct bypass valve pressure for the Coyote engine.
Maintaining the 2017 Convertible Ford Mustang Soft Top
The soft top is the heart of the convertible experience, but it is also the most vulnerable component of the car. Unlike a hardtop, the fabric roof is constantly exposed to UV rays, acid rain, and environmental debris. If you neglect the fabric, it will eventually thin out, lose its waterproofing, and develop unsightly “wear marks” near the folding hinges.
Cleaning the top should never involve a high-pressure car wash, as the force can drive water past the seals and damage the internal hydraulic cylinders. Instead, use a dedicated convertible top cleaner and a soft-bristle horsehair brush. Scrub in circular motions to lift dirt out of the weave, then rinse with a low-pressure garden hose until the water runs clear.
Once the top is dry, applying a fabric protectant like RaggTopp or 303 Fabric Guard is essential. These products create a hydrophobic barrier that makes water bead off and provides a shield against UV damage. Apply the protectant in a shaded area and let it cure for at least 12 to 24 hours before exposing the car to moisture.
Clearing the Drainage Holes
One of the most common causes of interior mold and electrical issues in a 2017 convertible ford mustang is clogged drainage holes. There are specific channels designed to catch water that runs off the top and direct it out through the bottom of the chassis. If these holes get plugged with leaves or pine needles, water will back up into the rear quarter panels or under the seats.
To find these drains, open the top halfway so the tonneau cover is lifted. Look for the rubber troughs near the base of the rear window and follow them down toward the wheel wells. Use a piece of flexible weed-whacker line or compressed air to gently clear any blockages. Never use a metal coat hanger, as you risk puncturing the rubber drain tubes.
Hydraulic System Inspection
The 2017 model uses an electric-over-hydraulic system to move the roof. If you notice the top moving slowly or hearing a whining noise from the rear, check the fluid level in the reservoir located behind the rear seat. If the fluid is low, you likely have a leak in one of the lines or a weeping cylinder seal.
Repairing hydraulic lines can be a messy job for a DIYer, but it is manageable with the right tools. Always use the specific Pentosin CHF 11S fluid or the Ford-recommended equivalent. If the top becomes stuck mid-cycle, there is a manual relief valve that allows you to close it by hand—refer to your owner’s manual for the exact location to avoid damaging the linkage.
Essential Mechanical Maintenance for Longevity
While the top gets all the attention, the mechanical bits of your Mustang need regular love to stay reliable. The S550 platform is generally robust, but there are a few areas where “over-maintenance” can prevent expensive repairs down the line. This is especially true if you enjoy taking your car to track days or long-distance road trips.
Brake maintenance is straightforward on this car, but the Brembo calipers found on the Performance Pack models require high-temp grease on the slide pins. If you feel a pulsation in the pedal, it is often due to pad deposits rather than warped rotors. A few hard stops from 60 MPH in a safe area can often “re-bed” the pads and smooth out the braking feel.
The independent rear suspension uses several rubber bushings that can perish over time, leading to “wheel hop” during hard acceleration. If you notice the rear end feeling “squishy” or hearing clunks over bumps, it is time to inspect the subframe bushings. Many enthusiasts upgrade to polyurethane inserts to sharpen the handling without sacrificing too much ride comfort.
Transmission Fluid and Differential Care
Ford claims the transmission fluid is “filled for life,” but most experienced mechanics disagree. For the 6R80 automatic, we recommend a fluid and filter change every 60,000 miles. This removes the metallic wear particles that can clog the solenoids and lead to harsh shifting or “flaring” between gears.
The rear differential also needs attention, especially if you have a limited-slip unit (LSD). Use a high-quality 75W-85 or 75W-90 gear oil with a friction modifier additive. Without the additive, the clutch packs in the differential will chatter and groan during tight turns. Always loosen the fill plug before the drain plug to ensure you can actually refill the unit.
Common Issues and Troubleshooting
No car is perfect, and the 2017 convertible ford mustang has a few known quirks that owners should watch for. One frequent complaint is the rear-view camera wiring harness. Because the harness is routed through the trunk hinge, the constant opening and closing can fatigue the wires, causing the camera image to flicker or disappear entirely.
Another issue involves the air conditioning evaporator core. If you notice a “gym locker” smell when you turn on the AC, or if the system stops blowing cold air, the evaporator may be leaking. This is a labor-intensive repair that often requires removing the dashboard, so if your car is still under a third-party warranty, this is the time to use it.
If you experience a vibration at highway speeds (the infamous “S550 vibration”), start by having your tires road-force balanced. If that doesn’t fix it, the culprit is often an imbalanced driveshaft or a misaligned rear subframe. Checking the torque on the subframe bolts is a quick DIY task that can solve many mysterious handling issues.
Electrical Gremlins
Modern Mustangs are rolling computers, and a weak battery can cause all sorts of strange electrical behavior. If your “blind spot monitoring” starts acting up or the windows don’t “index” (drop slightly) when you open the door, check your battery voltage. A battery older than three or four years is a prime candidate for replacement in these high-draw vehicles.
Performance Modifications for Enthusiasts
The 2017 Mustang is an excellent canvas for modifications. Because the convertible chassis is slightly less rigid than the coupe, your first mods should focus on chassis stiffening. A strut tower brace and “K-member” brace can significantly reduce cowl shake when driving over rough pavement with the top down.
Exhaust upgrades are also incredibly popular for convertibles because you get to hear the engine note so clearly. For the GT, a simple “resonator delete” or X-pipe can wake up the V8 sound without being overly drony on the highway. For the EcoBoost, a larger downpipe and a high-flow air filter can help the turbo spool faster and provide a more satisfying “blow-off” sound.
If you plan on lowering your car, be careful not to go too aggressive. A 1-inch drop using progressive-rate springs will improve the stance and handling while still allowing you to clear speed bumps and driveway inclines. Always follow up a suspension install with a professional alignment to prevent premature tire wear.
Safety First: Pre-Drive Checks and Gear
Before heading out on a long adventure in your 2017 convertible ford mustang, perform a “walk-around” inspection. Check your tire pressures—the door placard usually recommends 32 PSI for a balanced ride. Look for any signs of fluid leaks under the car, particularly red fluid (transmission/steering) or green/orange fluid (coolant).
Always keep a basic emergency kit in the trunk. This should include a tire inflator, a jump starter pack, and a small tool kit with 10mm and 13mm sockets (the most common sizes on a Ford). Since convertibles have limited trunk space, look for compact versions of these items that can tuck into the spare tire well.
Finally, remember that rollover protection in the 2017 model relies on the reinforced A-pillars (windshield frame). While the car is engineered for safety, it is always wise to drive within your limits, especially when the top is down. Wear your seatbelt, stay hydrated on hot days, and keep a pair of polarized sunglasses in the center console to reduce glare.
Frequently Asked Questions About the 2017 Convertible Ford Mustang
How often should I waterproof my Mustang’s soft top?
For a car that is driven daily and parked outside, we recommend applying a protectant every 6 to 12 months. If the car is garage-kept and only driven on weekends, you can likely go 18 to 24 months between treatments. A good test is to pour a little water on the top; if it doesn’t bead up, it’s time for a fresh coat.
Can I take my convertible through a standard car wash?
It is highly discouraged. Touchless car washes use high-pressure jets that can force water under the seals, while “brushed” washes can abrade the fabric and scratch the plastic or glass rear window. Hand washing is the only way to ensure the longevity of the convertible components.
Is the 2017 Mustang convertible good for winter driving?
Yes, with a few caveats. The multi-layer top is surprisingly well-insulated against the cold. However, the rear-wheel-drive layout requires a set of dedicated winter tires if you live in a snowy climate. Without them, the Mustang will struggle for traction even with “all-season” rubber.
What is the most common cause of a leaking roof?
Most leaks are caused by dirty or dry weatherstripping. The rubber seals where the windows meet the top need to be kept clean and supple. Use a silicone-based dressing like Shin-Etsu Grease to keep the rubber from cracking and to maintain a tight seal against the glass.
Closing Thoughts for the Proud Owner
Owning a 2017 convertible ford mustang is a rewarding experience that combines the heritage of an American icon with modern engineering. By staying on top of the unique maintenance requirements of the soft top and the S550 chassis, you ensure that every drive is as thrilling as the first one. Remember to listen to your car—it will often tell you when it needs attention through small changes in sound or feel.
Whether you are a weekend DIYer or a seasoned mechanic, the Mustang community is vast and full of resources. Don’t be afraid to tackle these maintenance tasks yourself; it’s the best way to truly know your machine. Stay safe, keep the shiny side up, and enjoy the wind in your hair!
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