how to fix my Ford F-150 13th Generation (2015-2020) that won't go into gear?

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

Error Codes

3-5 hours

Time

medium

Difficulty

high

Severity

3 min read

583 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 issues in Ford F-150 (2015-2020) that won't go into gear. Step-by-step guide with tools and parts required.

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 checking or replacing transmission fluid.

Symptoms

•Transmission warning light illuminated on the dashboard
•Engine revs without corresponding vehicle movement
•Difficulty shifting from park to drive or reverse
•Grinding or unusual noises when attempting to shift gears
•Fluid leaks underneath the vehicle
•Slipping sensation when attempting to accelerate

Diagnostic Steps

1
Check the transmission fluid level and condition.
2
Scan the vehicle’s computer for Diagnostic Trouble Codes (DTCs) using an OBD-II scanner.
3
Inspect the transmission linkage for any signs of damage or disconnection.
4
Test the brake light switch to ensure it is functioning correctly.
5
Examine the transmission fluid cooler for blockages or leaks.
6
Check the battery and alternator voltage, ensuring they are within specifications.

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
•Screwdriver
•Wrench set
•Transmission fluid pump
•Drain pan
•Funnel

Parts Required

•Transmission fluid (Mercon LV)
•Transmission filter
•Gasket for transmission pan
•Brake light switch

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Symptoms

•Transmission warning light illuminated on the dashboard

•Engine revs without corresponding vehicle movement

•Difficulty shifting from park to drive or reverse

•Grinding or unusual noises when attempting to shift gears

•Fluid leaks underneath the vehicle

•Slipping sensation when attempting to accelerate

Diagnostic Steps

1
Check the transmission fluid level and condition.
2
Scan the vehicle’s computer for Diagnostic Trouble Codes (DTCs) using an OBD-II scanner.
3
Inspect the transmission linkage for any signs of damage or disconnection.
4
Test the brake light switch to ensure it is functioning correctly.
5
Examine the transmission fluid cooler for blockages or leaks.
6
Check the battery and alternator voltage, ensuring they are within specifications.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is on a level surface and securely elevated with jack stands.
Disconnect the battery to prevent electrical shorts.

2. Check and Replace Transmission Fluid

Tools Required: Transmission fluid pump, socket set, funnel, drain pan.
Remove the transmission fluid pan using a socket set.
Allow old fluid to drain into a pan.
Inspect the pan for metal shavings or debris.
Replace the transmission filter if applicable.
Reinstall the pan with a new gasket and torque to manufacturer specifications (typically around 12-14 ft-lbs).
Refill the transmission with the appropriate type and amount of fluid (typically Mercon LV for this model).

3. Inspect and Adjust Transmission Linkage

Tools Required: Wrench set, screwdriver.
Locate the transmission linkage under the vehicle.
Inspect for any loose connections or signs of wear.
If necessary, adjust the linkage according to the service manual specifications.
Secure all connections properly.

4. Replace Brake Light Switch

Tools Required: Screwdriver, wrench set.
Locate the brake light switch, typically found near the brake pedal.
Disconnect the electrical connector and remove the switch.
Install the new brake light switch and reconnect the electrical connector.
Test the switch operation by pressing the brake pedal.

5. Test Drive and Check Functionality

Reconnect the battery.
Start the vehicle and allow it to warm up.
Test all gear shifts to ensure proper engagement.
Monitor for any fluid leaks or warning lights.