2017 Ford F-150 Won't Shift? Here's a DIY Fix

How to Fix Won't Shift

Experiencing shifting problems with your 2017 Ford F-150 can be frustrating. Some owners have faced expensive repairs. As one owner shared: "Then harsh shifts, then wouldn't engage 7th gear. Dealer wants $5,500 for a rebuild." (source). This guide will help you diagnose and potentially fix shifting issues in your truck.

Symptoms

Recognizing the symptoms of shifting problems early can save you from larger issues down the road. Owners have reported a variety of symptoms, which, while not directly related to shifting, can indicate potential problems with the vehicle's electrical system or overall performance, potentially affecting shifting. Owners have mentioned "dcm dtcs", which refers to Diagnostic Trouble Codes related to the Data Communication Module. These codes can sometimes be linked to issues that indirectly affect transmission operation if the module communicates with the transmission control system.

An exhaust leak has also been reported. While an exhaust leak itself doesn't directly cause shifting problems, it can affect engine performance, which might lead to perceived issues with shifting. For instance, a significant exhaust leak can alter the engine's air-fuel mixture, potentially affecting how the engine communicates with the transmission.

Another symptom reported by owners is noise. While the type of noise wasn't specified, unusual sounds from the engine or transmission area should always be investigated. Strange noises could be indicative of a mechanical problem that could eventually lead to shifting difficulties.

Streaking is also mentioned, which is most likely related to windshield wipers, but could indicate other fluid leaks. Leaks could impact the systems of your vehicle.

Finally, a "lifter rattle" could indicate problems with engine oil pressure or valve train components. Although not directly related to the transmission, significant engine issues can sometimes affect the transmission's ability to shift smoothly, especially in modern vehicles where the engine and transmission controls are closely integrated.

Most Likely Cause

Based on the limited data provided, a direct cause for the "won't shift" issue is difficult to pinpoint. However, given that electrical issues are sometimes linked to transmission problems, a possible culprit might be related to the USB module. While seemingly unrelated, a faulty USB module could potentially cause electrical interference or issues within the vehicle's communication network (CAN bus), which in turn could affect the transmission control system. It's important to note that this is a potential cause based on the available data, and further investigation is needed.

How to Diagnose

Diagnosing a "won't shift" issue requires a systematic approach. Here's how you can start:

1. Check for Diagnostic Trouble Codes (DTCs): Use an OBD-II scanner to check for any stored DTCs. Pay close attention to codes related to the transmission, engine, or data communication module (DCM). Even seemingly unrelated codes, like those associated with the USB module, could provide clues.

2. Inspect the USB Module: Visually inspect the USB module for any signs of damage or corrosion. Check the wiring harness connected to the module for loose connections or damaged wires.

3. Check Electrical Connections: Since electrical issues are suspected, thoroughly inspect all electrical connections related to the transmission control system. Look for loose connections, corroded terminals, or damaged wiring.

4. Verify Battery Voltage: Ensure that the battery voltage is within the normal range. Low voltage can sometimes cause erratic behavior in electronic control systems.

5. Transmission Fluid Level and Condition: Check the transmission fluid level and condition. Low fluid or contaminated fluid can cause shifting problems. The fluid should be bright red and free of debris.

Tools needed:

• OBD-II scanner
• Multimeter
• Basic hand tools (sockets, wrenches, screwdrivers)
• Flashlight

Step-by-Step Fix

Since the primary data points towards potential electrical issues and the USB module, consider these steps.

1. Disconnect the Battery: Disconnect the negative battery terminal to prevent any electrical issues during the repair process.

2. Inspect the USB Module: Locate the USB module (refer to your vehicle's repair manual for the exact location). Visually inspect the module and its wiring harness for any signs of damage or corrosion.

3. Check Wiring Connections: Disconnect the wiring harness from the USB module and inspect the connector pins for corrosion or damage. Clean the pins with electrical contact cleaner if necessary. Make sure the "female pins" make good contact.

4. Reconnect the Wiring Harness: Reconnect the wiring harness to the USB module, ensuring a secure connection.

5. Clear Diagnostic Trouble Codes (DTCs): Use an OBD-II scanner to clear any DTCs that may be related to the USB module or transmission.

6. Test Drive the Vehicle: Take the vehicle for a test drive to see if the shifting problem has been resolved. Pay attention to how the transmission shifts through all gears.

7. Replace the USB Module (if necessary): If the shifting problem persists, consider replacing the USB module with a new or refurbished unit. As one owner reported a high cost of repair: "Dealer wants $5,500 for a rebuild" (source), it may be worth replacing this less expensive part first.

8. Check Transmission Fluid: Verify transmission fluid levels. Add more if levels are low.

9. Inspect Wiring Harnesses: Ensure no other wiring harnesses are damaged.

10. Reconnect the Battery: Reconnect the negative battery terminal.

Parts and Tools Needed

• USB Module (Part number varies depending on trim and features)
• OBD-II scanner
• Electrical contact cleaner
• Basic hand tools (sockets, wrenches, screwdrivers)
• Multimeter

Real Owner Costs

Based on the data, here's a breakdown of potential costs:

• USB Module Replacement: The cost of a USB module can vary depending on the source (dealer, aftermarket, used). Expect to pay anywhere from $50 to $300 for the module itself.

• Professional Transmission Rebuild: As one owner reported, a dealer quoted $5,500 for a transmission rebuild. This is a significant expense and highlights the importance of early diagnosis and preventative maintenance.

• DIY vs. Shop: Doing the USB module replacement yourself can save you on labor costs, which can range from $100 to $300 at a professional shop. However, if the problem is more complex and requires a transmission rebuild, it's best to take it to a qualified mechanic.

• Vehicle Purchase Cost: One owner mentioned purchasing a vehicle for "$24,300" (source), highlighting the initial investment in the vehicle.

Prevention

Preventing shifting problems in your 2017 Ford F-150 involves regular maintenance and attention to detail.

• Regular Transmission Fluid Changes: Follow the manufacturer's recommended service intervals for transmission fluid changes. This helps keep the transmission lubricated and prevents wear and tear on internal components.

• Check and Maintain Electrical Connections: Regularly inspect and maintain electrical connections, especially those related to the transmission control system and USB module. Clean any corroded terminals and ensure secure connections.

• Monitor for Unusual Symptoms: Pay attention to any unusual symptoms, such as harsh shifting, unusual noises, or warning lights on the dashboard. Addressing these issues early can prevent them from escalating into more significant problems.

• Proper Driving Habits: Avoid aggressive driving habits, such as rapid acceleration and hard braking, which can put stress on the transmission.

What Owners Say

Real experiences from FORD owners:

Owner Experiences

"Transmission issues at 80k - be warned My 2018 F-150's 10-speed finally gave up at 80k miles." — ExpensiveLesson (source)

"2017 Tundra TRD Pro vs 2021 Nissan PRO-4X vs 2023 Ford F-150 FX4 Right now, I've got a 2013 F-150 with the 3.7L V6 (4x2) that's been a total champ—engine and trans are still going strong at exactly 200K miles." — O_O___XD (source)

"Marketed as a 1.5” but added 2” and change to the front end. I went the route of dropping the lower control arms out so I wouldn’t have to mess with the IWEs (done it before and it’s not terrible, but genuinely didn’t feel like messing with them today)." — bemery96 (source)

Real Repair Costs

"then harsh shifts, then wouldn't engage 7th gear. Dealer wants $5,500 for a rebuild." — ExpensiveLesson (source)

"No major issues, and it's handled everything I've thrown at it for work and daily driving. I'm eyeing a either a 2017 Toyota Tundra TRD Pro CrewMax 5.7L (101K Miles,$31K); 2021 Nissan Titan 5.6L PRO-4X Crew Cab ( 98K miles, $27K) ; 2023 Ford F-150 3.5L EcoBoost FX4 ( 78K miles, $31K) ." — O_O___XD (source)

"Vehicle maintained and sold in AZ. How’d I do? $24,300." — needhelp9413 (source)

FAQ

Q: How long does it take to fix a "won't shift" issue?

A: The time it takes to fix a "won't shift" issue can vary depending on the cause. A simple USB module replacement might take an hour or two, while a transmission rebuild could take several days.

Q: Can I drive with a "won't shift" issue?

A: It's not recommended to drive with a "won't shift" issue. Doing so can cause further damage to the transmission and potentially leave you stranded.

Q: Is this a common issue on the 2017 Ford F-150?

A: Based on the limited data, it's difficult to say whether this is a common issue. However, transmission problems can occur in any vehicle, especially as it ages.

Q: DIY vs. mechanic - what's recommended?

A: If you're comfortable working on your vehicle and have the necessary tools, you can attempt the USB module replacement yourself. However, if the problem is more complex or you're not sure how to proceed, it's best to take it to a qualified mechanic. Owners have reported high repair costs, so it's best to get an estimate first.