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

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

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

526 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 (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 working on the transmission.

Symptoms

•Transmission slips during acceleration
•Delayed or rough shifting between gears
•Unusual noises (grinding or whining) from the transmission
•Warning lights illuminated on the dashboard (e.g., check engine light)
•Fluid leaks under the vehicle
•Poor fuel economy

Diagnostic Steps

1
Check the transmission fluid level and condition using the dipstick.
2
Scan the vehicle’s onboard diagnostics (OBD-II) for any error codes.
3
Inspect the transmission fluid for contamination or burnt smell.
4
Examine the transmission filter for clogs or restrictions.
5
Inspect electrical connections to the transmission control module (TCM).
6
Test drive the vehicle to replicate the slipping issue and monitor behavior.

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
•Transmission fluid dipstick
•Transmission jack
•Safety glasses
•Gloves

Parts Required

•Transmission fluid
•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
Check the transmission fluid level and condition using the dipstick.
2
Scan the vehicle’s onboard diagnostics (OBD-II) for any error codes.
3
Inspect the transmission fluid for contamination or burnt smell.
4
Examine the transmission filter for clogs or restrictions.
5
Inspect electrical connections to the transmission control module (TCM).
6
Test drive the vehicle to replicate the slipping issue and monitor behavior.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, transmission fluid dipstick, transmission jack, safety glasses, gloves.
Ensure the vehicle is on a level surface and the engine is turned off.
Disconnect the battery before starting any electrical work.

2. Check and Replace Transmission Fluid

Check Fluid Level:
- Remove the transmission dipstick and wipe it clean.
- Reinsert the dipstick and remove it again to check the fluid level.
- If low, add the appropriate type of transmission fluid (consult owner's manual).
Replace Contaminated Fluid:
- Place a transmission pan under the transmission.
- Remove the transmission pan bolts with a socket set.
- Carefully lower the pan and drain the old fluid.
- Replace the transmission filter if necessary (remove old filter and install a new one).

3. Inspect and Repair Electrical Connections

Inspect Wiring:
- Check the wiring harness connected to the TCM for any damage or corrosion.
- Clean any corroded connections and secure loose wires.

4. Reassemble and Refill

Reattach Transmission Pan:
- Install a new gasket on the pan and reattach it.
- Torque the bolts to manufacturer specifications (usually around 10-12 ft-lbs).
Refill Transmission Fluid:
- Using a funnel, refill the transmission with the appropriate fluid until it reaches the correct level on the dipstick.

5. Final Checks

Reconnect the battery and start the engine.
Allow the vehicle to run and check for leaks around the transmission pan and fittings.