why does my Ford F-150 13th Generation (2015-2020) transmission slip when I accelerate

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

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

557 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 the battery before working on electrical components.
•Allow the engine and transmission to cool before starting work to prevent burns.

Symptoms

•Slipping sensation when accelerating
•Delayed shifting or rough shifts
•Engine RPMs increase without corresponding vehicle speed
•Warning lights on the dashboard, such as the check engine light
•Unusual noises during gear changes, such as grinding or whining

Diagnostic Steps

1
Scan the vehicle's onboard computer with an OBD-II scanner for trouble codes.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect the transmission fluid for leaks underneath the vehicle.
4
Test the transmission solenoids using a multimeter to ensure they are functioning correctly.
5
Conduct a road test to assess the severity of the transmission slipping.

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
•Multimeter
•Socket set
•Torque wrench
•Transmission fluid pump
•Funnel
•Catch pan

Parts Required

•Transmission fluid (specific to Ford specifications)
•Transmission filter
•Transmission solenoid (if replacement is needed)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan the vehicle's onboard computer with an OBD-II scanner for trouble codes.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect the transmission fluid for leaks underneath the vehicle.
4
Test the transmission solenoids using a multimeter to ensure they are functioning correctly.
5
Conduct a road test to assess the severity of the transmission slipping.

Solution

1. Preparation

Gather tools and parts.
Ensure the vehicle is on a level surface and secure with wheel chocks.
Disconnect the battery to prevent electrical issues.

2. Check and Replace Transmission Fluid

Tools Required: Transmission fluid pump, funnel, catch pan.
Steps:
1. Remove the transmission dipstick and check the fluid level.
2. If the fluid is low, add the appropriate transmission fluid as specified in the owner's manual.
3. If fluid is dark or has a burnt smell, prepare to replace it.
4. Place a catch pan under the transmission pan.
5. Remove the transmission pan bolts and carefully lower the pan to drain the old fluid.
6. Replace the transmission filter if applicable.

3. Inspect and Replace the Transmission Solenoid

Tools Required: Socket set, torque wrench, multimeter.
Steps:
1. Locate the transmission solenoids, usually accessible via the transmission valve body.
2. Disconnect the electrical connectors from the solenoids.
3. Use a multimeter to test the solenoid resistance according to specifications.
4. If faulty, remove the old solenoid and replace it with a new one.
5. Reconnect the electrical connectors and ensure proper sealing.

4. Reassemble and Refill Transmission Fluid

Tools Required: Torque wrench for securing the pan.
Steps:
1. Reinstall the transmission pan and tighten bolts to the manufacturer’s torque specifications.
2. Refill the transmission with the correct type and amount of fluid.
3. Start the engine and allow it to reach operating temperature.
4. Shift through all gears and check fluid level again, adding more if necessary.