why does my Ford Explorer Sixth Generation (2020-present) transmission slip when shifting

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

565 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 2020-2023 Ford Explorer. Step-by-step guide with symptoms, diagnostic steps, 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 opening the transmission pan.

Symptoms

•Transmission hesitates or slips during acceleration
•Unusual engine RPM fluctuations
•Harsh or rough shifting between gears
•Check engine light illuminated
•Fluid leaks under the vehicle
•Transmission overheating warning

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related faults.
2
Check the transmission fluid level and condition; look for signs of contamination or burning.
3
Inspect the transmission fluid for proper color (typically red) and smell (should not smell burnt).
4
Examine the transmission filter for clogging or damage.
5
Inspect the transmission control module (TCM) connections for corrosion or loose wiring.
6
Test the vehicle’s speed sensor to ensure it is functioning correctly and sending accurate data.

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 set
•Transmission fluid pump
•Transmission jack

Parts Required

•Transmission fluid (Mercon LV)
•Transmission filter
•Transmission pan gasket

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related faults.
2
Check the transmission fluid level and condition; look for signs of contamination or burning.
3
Inspect the transmission fluid for proper color (typically red) and smell (should not smell burnt).
4
Examine the transmission filter for clogging or damage.
5
Inspect the transmission control module (TCM) connections for corrosion or loose wiring.
6
Test the vehicle’s speed sensor to ensure it is functioning correctly and sending accurate data.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, screwdriver set, transmission fluid pump, transmission jack.
Disconnect the vehicle's battery to ensure safety while working on electrical components.

2. Check and Replace Transmission Fluid

Locate the transmission dipstick and remove it to check the fluid level.
If low, use a transmission fluid pump to add the correct type of fluid (consult the owner’s manual for specifications).
If the fluid is dirty or burnt, proceed to drain and replace the fluid:
- Remove the transmission pan bolts using a socket wrench.
- Carefully lower the transmission pan and allow old fluid to drain completely.
- Replace with new fluid as specified by the manufacturer (typically Mercon LV for Ford).
- Reinstall the transmission pan with a new gasket, torque bolts to specification (usually 8-10 Nm).

3. Replace Transmission Filter

After draining the fluid, access the transmission filter (usually located in the transmission pan).
Remove the old filter by unscrewing it or unclipping it from its housing.
Install the new filter, ensuring it is securely attached.
Reassemble the transmission pan.

4. Inspect and Repair Electrical Connections

Inspect TCM wiring and connectors for any signs of wear, corrosion, or loose connections.
Clean any corrosion and ensure secure connections.
If damaged, replace the wiring harness or connectors as needed.

5. Test Drive and Monitor

Reconnect the battery and start the vehicle.
Check for any leaks or unusual sounds.
Conduct a test drive to confirm that the transmission shifts smoothly without slipping.