how to fix transmission slipping in Ford F-150 13th Generation (2015-2020)

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

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

612 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 transmission slipping in Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Check engine light illuminated
•Delayed or harsh shifting
•Engine revving without corresponding increase in speed
•Loss of power during acceleration
•Fluid leaks under the vehicle
•Unusual noises (grinding or whining) from the transmission

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Check the transmission fluid level and condition; look for discoloration or burnt smell.
3
Inspect for visible fluid leaks around the transmission pan and seals.
4
Examine the condition of the transmission filter and fluid for contamination.
5
Test the transmission with a pressure gauge to ensure it is operating within manufacturer specifications.
6
Inspect the throttle position sensor (TPS) and vehicle speed sensor (VSS) for proper operation.

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
•Fluid pump
•Multimeter
•Funnel

Parts Required

•Transmission fluid (specific type as per manufacturer)
•Transmission filter
•Gasket for transmission pan

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Check the transmission fluid level and condition; look for discoloration or burnt smell.
3
Inspect for visible fluid leaks around the transmission pan and seals.
4
Examine the condition of the transmission filter and fluid for contamination.
5
Test the transmission with a pressure gauge to ensure it is operating within manufacturer specifications.
6
Inspect the throttle position sensor (TPS) and vehicle speed sensor (VSS) for proper operation.

Solution

1. Preparation

Gather all tools and parts required for the repair.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to ensure safety while working on electrical components.

2. Check and Replace Transmission Fluid

Tools Required: Fluid pump, socket set, funnel, transmission fluid (consult owner’s manual for type).
Check the transmission fluid level with the dipstick; add fluid if low.
If fluid is dirty or burnt, proceed to replace:
1. Remove the transmission pan by unscrewing the bolts (torque specification: typically 10-15 ft-lbs).
2. Drain the old fluid into a suitable container.
3. Remove the old filter (if applicable) and install a new one.
4. Clean the pan and replace the gasket.
5. Reinstall the pan and tighten to specifications.
6. Refill the transmission with new fluid using a funnel.

3. Inspect and Replace Transmission Filter

Tools Required: Socket set, new transmission filter, gasket, transmission fluid.
If the filter was not replaced in the fluid change:
1. Follow the steps in the previous section to remove the pan.
2. Locate and remove the old filter.
3. Install the new filter, ensuring it is seated correctly.
4. Reinstall the pan and refill fluid as necessary.

4. Inspect Electrical Components

Tools Required: Multimeter.
Check the TPS and VSS:
1. Disconnect the electrical connectors from the TPS and VSS.
2. Use a multimeter to test the output voltage as per specifications provided in the service manual.
3. Replace any faulty components.

5. Test Drive

After repairs, reconnect the battery.
Start the engine and allow it to reach operating temperature.
Conduct a test drive to ensure the transmission shifts smoothly without slipping.