how to fix Ford F-150 13th Generation (2015-2020) rough shifting issue

Ford F-150 13th Generation (2015-2020)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

555 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix rough shifting issues in Ford F-150 13th Generation (2015-2020). Step-by-step guide with symptoms, diagnostics, and repairs.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening the transmission pan to avoid burns.

Symptoms

•Noticeable jerking during upshifts or downshifts
•Delay in gear engagement
•Engine RPMs increasing without corresponding vehicle speed
•Check engine light illuminated
•Unusual noises (grinding or whining) from the transmission area
•Poor acceleration or loss of power when shifting

Diagnostic Steps

1
Scan the vehicle with an OBD-II scanner to check for any error codes related to the transmission.
2
Inspect transmission fluid condition; check for proper level, color, and smell.
3
Examine the transmission control module (TCM) connections for any loose or corroded wiring.
4
Test the throttle position sensor (TPS) to ensure it is functioning correctly.
5
Check for any software updates or recalls related to the transmission system.
6
Inspect the transmission mounts for wear or damage.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Torque wrench
•Transmission fluid pump
•Electrical cleaner spray

Parts Required

•Transmission fluid (Mercon LV)
•Transmission filter and gasket (if applicable)
•Throttle position sensor (if needed)

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Diagnostic Steps

1
Scan the vehicle with an OBD-II scanner to check for any error codes related to the transmission.
2
Inspect transmission fluid condition; check for proper level, color, and smell.
3
Examine the transmission control module (TCM) connections for any loose or corroded wiring.
4
Test the throttle position sensor (TPS) to ensure it is functioning correctly.
5
Check for any software updates or recalls related to the transmission system.
6
Inspect the transmission mounts for wear or damage.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface with the engine off.
Disconnect the battery to prevent electrical shorts.

2. Check and Replace Transmission Fluid

Locate the transmission dipstick and remove it.
Wipe the dipstick clean and reinsert it; remove again to check fluid level.
If fluid is low, add the recommended transmission fluid type (typically Mercon LV for Ford).
If the fluid is dark or burnt-smelling, proceed to drain and replace.
To drain, remove the transmission pan bolts and carefully lower the pan.
Clean the pan and replace the filter if necessary.
Reinstall the pan with a new gasket, tightening bolts to the manufacturer’s specified torque.

3. Inspect and Repair Electrical Connections

Locate the TCM and visually inspect all connectors.
Clean any corrosion with electrical cleaner and reconnect securely.
If any wires are damaged, repair or replace as necessary.

4. Test and Replace Throttle Position Sensor (if required)

Locate the throttle position sensor on the throttle body.
Disconnect the electrical connector and remove the sensor.
Install a new throttle position sensor, ensuring it aligns correctly.
Reconnect the electrical connector.

5. Reconnect Battery and Clear Codes

Reconnect the battery terminals securely.
Use the OBD-II scanner to clear any stored error codes.
Perform a test drive to assess the effectiveness of the repairs.