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

516 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 13th Generation (2015-2020). Step-by-step guide with diagnostic procedures 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 systems.
•Allow the engine to cool before opening the transmission or checking fluid levels.

Symptoms

•Check engine light illuminated
•Engine RPM increases without corresponding vehicle speed increase
•Harsh or delayed shifting
•Fluid leaks under the vehicle
•Transmission warning message displayed on the dashboard
•Increased engine noise during acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related faults.
2
Check the transmission fluid level and quality; look for burnt odor or metal shavings.
3
Inspect the transmission pan for leaks or damage.
4
Test the transmission fluid pressure using a pressure gauge.
5
Examine electrical connections and wiring to the transmission control module for wear or corrosion.
6
Check for proper operation of the throttle position sensor (TPS) and vehicle speed sensor (VSS).

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
•Multimeter
•Transmission pressure gauge

Parts Required

•Transmission fluid (Mercon LV or equivalent)
•Transmission filter
•Transmission pan gasket

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 faults.
2
Check the transmission fluid level and quality; look for burnt odor or metal shavings.
3
Inspect the transmission pan for leaks or damage.
4
Test the transmission fluid pressure using a pressure gauge.
5
Examine electrical connections and wiring to the transmission control module for wear or corrosion.
6
Check for proper operation of the throttle position sensor (TPS) and vehicle speed sensor (VSS).

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the battery to ensure safety during electrical work.

2. Fluid Change

Sub-steps:
1. Remove the transmission pan bolts using a socket set and drain the old fluid into a suitable container.
2. Clean the transmission pan and replace the old filter with a new one.
3. Reinstall the transmission pan, ensuring to use a new gasket, and torque the bolts to the manufacturer's specifications (typically around 10-12 ft-lbs).
4. Refill the transmission with the correct type and amount of fluid (consult the owner’s manual; typically Mercon LV or equivalent).

3. Electrical Inspection

Sub-steps:
1. Inspect and clean the electrical connectors to the transmission control module.
2. Use a multimeter to check the voltage and resistance of the TPS and VSS; replace them if they are out of specifications.
3. Ensure all ground connections are clean and secure.

4. Pressure Testing

Sub-steps:
1. Connect a transmission pressure gauge to the test port.
2. Start the engine and shift through all gears to evaluate pressure readings; compare with manufacturer specifications.
3. If pressure is low, inspect internal components or consider a rebuild.