why is my Ford F-150 13th Generation (2015-2020) transmission slipping

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

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

534 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 issues 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 to prevent shorts.
•Allow the engine and transmission to cool before servicing to prevent burns.

Symptoms

•Engine RPM increases without a corresponding increase in vehicle speed
•Harsh or delayed shifting between gears
•Check engine light illuminated
•Unusual noises (grinding or whining) during gear shifts
•Fluid leakage under the vehicle
•Poor acceleration response

Diagnostic Steps

1
Scan the vehicle's onboard diagnostics (OBD-II) system for any stored error codes.
2
Inspect the transmission fluid level and condition (check for discoloration or burnt odor).
3
Check for fluid leaks around the transmission pan or cooler lines.
4
Test the transmission cooler for blockages or restrictions.
5
Inspect the transmission control module (TCM) for any faults or wiring issues.
6
Evaluate the condition of the transmission filter for clogs or debris.

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
•Drain pan

Parts Required

•Transmission fluid (Mercon LV)
•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 the vehicle's onboard diagnostics (OBD-II) system for any stored error codes.
2
Inspect the transmission fluid level and condition (check for discoloration or burnt odor).
3
Check for fluid leaks around the transmission pan or cooler lines.
4
Test the transmission cooler for blockages or restrictions.
5
Inspect the transmission control module (TCM) for any faults or wiring issues.
6
Evaluate the condition of the transmission filter for clogs or debris.

Solution

1. Preparation

Gather necessary tools and parts. Ensure the vehicle is parked on a level surface and the engine is off.
Safety warning: Disconnect the battery before working on electrical systems to prevent shorts.

2. Check and Change Transmission Fluid

Sub-steps:
1. Remove the transmission dipstick and wipe it clean.
2. Insert the dipstick back into the tube and then remove it again to check the fluid level.
3. If low, add the recommended type of transmission fluid (typically Mercon LV for F-150).
4. If the fluid is burnt or dirty, drain the fluid using a drain pan and replace it.
5. Replace the transmission filter if clogged: remove the transmission pan and filter, clean the pan, and install a new filter.
6. Reinstall the transmission pan with a new gasket, tightening bolts to the manufacturer’s torque specifications (usually around 10-12 ft-lbs).

3. Inspect Transmission Control Module (TCM)

Sub-steps:
1. Locate the TCM, usually found near the transmission or under the dashboard.
2. Disconnect the wiring harness connected to the TCM.
3. Inspect the connections for corrosion or damage.
4. Reconnect or replace the TCM if faulty, ensuring all connections are secure.

4. Test Drive

After completing repairs, take the vehicle for a test drive to monitor transmission performance.
Check for any slipping or shifting issues during different driving conditions.