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

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

Error Codes

3-5 hours

Time

medium

Difficulty

high

Severity

3 min read

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

Affected Component

Transmission

Estimated Time

3-5 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before working on or draining the transmission fluid.

Symptoms

•Slipping sensation during acceleration
•Engine revs higher than normal without corresponding vehicle speed increase
•Delayed or harsh shifting between gears
•Check engine light illuminated
•Fluid leaks under the vehicle
•Unusual noises from the transmission (grinding or whining)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related fault codes.
2
Check the transmission fluid level and condition; ensure it is at the correct level and not burnt or contaminated.
3
Inspect the transmission fluid for metal shavings or debris that might indicate wear.
4
Test the transmission solenoids with a multimeter to ensure they are functioning correctly.
5
Check for any vacuum leaks or issues with the throttle position sensor, as these can affect transmission performance.
6
Inspect the transmission filter and screen for clogs or restrictions.

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
•Multimeter
•Fluid pump
•Transmission fluid
•Transmission filter kit
•Torque wrench
•Rags

Parts Required

•Transmission fluid
•Transmission filter kit
•Gasket for transmission pan (if applicable)

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 fault codes.
2
Check the transmission fluid level and condition; ensure it is at the correct level and not burnt or contaminated.
3
Inspect the transmission fluid for metal shavings or debris that might indicate wear.
4
Test the transmission solenoids with a multimeter to ensure they are functioning correctly.
5
Check for any vacuum leaks or issues with the throttle position sensor, as these can affect transmission performance.
6
Inspect the transmission filter and screen for clogs or restrictions.

Solution

1. Preparation

Tools Needed: OBD-II scanner, socket set, multimeter, fluid pump, transmission fluid, transmission filter kit, torque wrench, rags.
Park the vehicle on a level surface, engage the parking brake, and disconnect the battery.

2. Check and Replace Transmission Fluid

Locate the transmission dipstick (if applicable) and remove it.
Check fluid level with the dipstick; add fluid if low.
If the fluid is dark or burnt, drain the transmission fluid by removing the drain plug (if equipped) or removing the pan.
Replace the fluid using a fluid pump, ensuring to use the manufacturer-recommended transmission fluid type (consult the owner's manual for specifications).
Reinstall the drain plug or transmission pan with a new gasket, tightening to the manufacturer’s torque specifications.

3. Replace Transmission Filter

Remove the transmission pan to access the filter.
Unscrew and remove the old filter.
Install the new filter, making sure to align it properly.
Reinstall the transmission pan and ensure it is sealed tight.

4. Test Transmission Solenoids

Disconnect the electrical connector from the transmission solenoids.
Using a multimeter, check the resistance across the solenoid terminals; compare readings with specifications in the service manual.
Replace any faulty solenoids as necessary.

5. Reconnect Battery and Test Drive

Reconnect the vehicle battery.
Start the vehicle and allow it to reach operating temperature.
Test drive the vehicle to ensure the transmission shifts smoothly and does not slip.