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

Ford Explorer Sixth Generation (2020-present)

Error Codes

4-6 hours

Time

hard

Difficulty

high

Severity

3 min read

584 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 Explorer (2020-present). Step-by-step guide with symptoms, diagnostics, and repair instructions.

Affected Component

Transmission

Estimated Time

4-6 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Ensure the engine is cool before working on the transmission components.

Symptoms

•Slipping sensation during acceleration
•Unusual engine revving without corresponding vehicle speed increase
•Delayed engagement when shifting from park to drive or reverse
•Check engine light illuminated
•Harsh or abrupt shifting between gears
•Fluid leaks under the vehicle

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Inspect the transmission fluid level and condition; look for burnt smell or dark coloration.
3
Check for any visible leaks around the transmission pan or lines.
4
Inspect the transmission filter for clogs or debris.
5
Test the transmission solenoids for proper operation using a multimeter.
6
Examine the wiring harness and connectors for damage or corrosion.

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
•Torque wrench
•Multimeter
•Drain pan
•Funnel

Parts Required

•Transmission fluid (Mercon LV)
•Transmission filter (if applicable)
•Transmission pan gasket
•Transmission solenoids (if applicable)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Inspect the transmission fluid level and condition; look for burnt smell or dark coloration.
3
Check for any visible leaks around the transmission pan or lines.
4
Inspect the transmission filter for clogs or debris.
5
Test the transmission solenoids for proper operation using a multimeter.
6
Examine the wiring harness and connectors for damage or corrosion.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and engage the parking brake.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Change Transmission Fluid

Check Fluid Level:
- Remove the dipstick and wipe it clean.
- Reinsert and remove it again to check the fluid level.
Change Fluid:
- Place a drain pan under the transmission pan.
- Remove the transmission pan bolts with a socket set and carefully drop the pan.
- Discard old fluid and replace the filter if present.
- Clean the pan and magnet, ensuring no debris is left.
- Install a new gasket and reattach the pan, torqueing the bolts to manufacturer specifications (typically around 10-12 ft-lbs).

3. Replace Transmission Filter

If your model has a replaceable filter:
- Remove any retaining clips or bolts holding the filter in place.
- Replace with a new filter, ensuring a proper seal.
- Reconnect any lines that were disconnected during the process.

4. Inspect and Replace Transmission Solenoids

Remove Transmission Valve Body:
- Disconnect the wiring harness from the solenoids.
- Remove bolts securing the valve body and carefully lower it.
Replace Faulty Solenoids:
- Remove the solenoids from their mounting locations.
- Install new solenoids, ensuring they lock into place.

5. Refill Transmission Fluid

Use a funnel to refill the transmission with the appropriate type and amount of fluid (typically Mercon LV for Ford vehicles).
Start the engine and let it idle; cycle through all gears to circulate fluid.
Check the fluid level again and add more if necessary.