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

552 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

3-5 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is on a level surface and securely supported before working underneath.
•Allow the engine and transmission to cool before starting any work.

Symptoms

•Slipping sensation when accelerating
•Engine RPMs increase without corresponding vehicle speed increase
•Delayed or harsh shifting between gears
•Check engine light may be illuminated
•Fluid leaks under the vehicle
•Unusual noises from the transmission (grinding or whining)

Diagnostic Steps

1
Check the transmission fluid level and condition using the dipstick.
2
Scan the vehicle's onboard diagnostics (OBD-II) system for any stored error codes.
3
Inspect the transmission fluid for signs of contamination or burnt odor.
4
Examine the transmission filter for clogs or restrictions.
5
Inspect the transmission mounts for damage or wear.
6
Test the transmission solenoids for proper operation using a multimeter.

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
•Funnel

Parts Required

•Transmission fluid
•Transmission filter
•Transmission pan gasket
•Solenoids (if replacement is necessary)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the transmission fluid level and condition using the dipstick.
2
Scan the vehicle's onboard diagnostics (OBD-II) system for any stored error codes.
3
Inspect the transmission fluid for signs of contamination or burnt odor.
4
Examine the transmission filter for clogs or restrictions.
5
Inspect the transmission mounts for damage or wear.
6
Test the transmission solenoids for proper operation using a multimeter.

Solution

1. Preparation

Gather all necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the battery to prevent electrical shorts.

2. Check and Replace Transmission Fluid

Tools Required: Funnel, transmission fluid (consult owner’s manual for specification)
Sub-steps:
1. Remove the transmission dipstick and check fluid level and condition.
2. If fluid is low or burnt, drain the old fluid using a pan.
3. Replace with the appropriate type and amount of new transmission fluid.
4. Reinsert the dipstick and check the level again.

3. Replace Transmission Filter

Tools Required: Socket set, gasket scraper
Sub-steps:
1. Remove the transmission pan using the socket set.
2. Carefully scrape off any old gasket material from the pan and transmission.
3. Remove the old filter and replace it with a new one.
4. Reinstall the transmission pan with a new gasket, torquing to manufacturer specifications.

4. Inspect and Replace Solenoids (if necessary)

Tools Required: Socket set, multimeter
Sub-steps:
1. Access the transmission solenoids according to the service manual.
2. Disconnect the electrical connectors from the solenoids.
3. Test each solenoid using a multimeter for resistance; replace if out of specification.
4. Reconnect the solenoids and ensure a secure connection.

5. Reassemble and Reconnect

Tools Required: Basic hand tools
Sub-steps:
1. Reconnect the battery.
2. Start the vehicle and allow it to reach operating temperature.
3. Check for leaks around the transmission pan and solenoids.