how to troubleshoot transmission slipping in Ford Explorer Sixth Generation (2020-present)

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

563 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 troubleshoot and fix transmission slipping in Ford Explorer (2020-present). Step-by-step guide with symptoms, diagnostics, 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 vehicle to cool before performing any work on the transmission.

Symptoms

•Engine RPM increases without a corresponding increase in vehicle speed
•Harsh or delayed shifting between gears
•Unusual noises when the transmission engages
•Warning lights illuminated on the dashboard, such as the check engine light
•Fluid leaks under the vehicle
•Burning smell from the transmission area

Diagnostic Steps

1
Scan the vehicle’s OBD-II system for any diagnostic trouble codes (DTCs) related to the transmission.
2
Check the transmission fluid level and condition; look for signs of contamination or burning.
3
Inspect the transmission fluid cooler lines for leaks or damage.
4
Test the transmission control module (TCM) for proper function.
5
Perform a road test to replicate the slipping condition and observe shifting behavior.
6
Inspect the throttle position sensor and ensure it is functioning correctly.

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
•Fluid catch pan

Parts Required

•Transmission fluid
•Transmission filter
•Gasket for transmission pan

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Symptoms

•Engine RPM increases without a corresponding increase in vehicle speed

•Harsh or delayed shifting between gears

•Unusual noises when the transmission engages

•Warning lights illuminated on the dashboard, such as the check engine light

•Fluid leaks under the vehicle

•Burning smell from the transmission area

Diagnostic Steps

1
Scan the vehicle’s OBD-II system for any diagnostic trouble codes (DTCs) related to the transmission.
2
Check the transmission fluid level and condition; look for signs of contamination or burning.
3
Inspect the transmission fluid cooler lines for leaks or damage.
4
Test the transmission control module (TCM) for proper function.
5
Perform a road test to replicate the slipping condition and observe shifting behavior.
6
Inspect the throttle position sensor and ensure it is functioning correctly.

Solution

1. Preparation

Gather all necessary tools and parts. Ensure the vehicle is parked on a level surface.
Disconnect the battery to avoid electrical shorts during work.
Tools Required: OBD-II scanner, socket set, torque wrench, fluid catch pan.

2. Check and Replace Transmission Fluid

Check Fluid Level:
- Locate the transmission dipstick. Remove it and wipe it clean.
- Reinsert the dipstick and remove it again to check the fluid level. If low, add the appropriate transmission fluid.
Replace Fluid:
- Drain the old transmission fluid using a fluid catch pan by removing the drain plug.
- Replace the drain plug and tighten it to the manufacturer’s torque specification.
- Refill the transmission with new fluid according to the manufacturer’s guidelines.

3. Inspect and Replace Transmission Filter

Remove Transmission Pan:
- Support the transmission pan with a jack and remove bolts using a socket set.
- Carefully lower the pan and allow the remaining fluid to drain into the catch pan.
Replace Filter:
- Remove the old transmission filter and replace it with a new filter.
- Reinstall the pan, ensuring a new gasket is used for a proper seal.

4. Test Transmission Control Module (TCM)

Reprogram or Replace TCM:
- Use the OBD-II scanner to check for TCM updates or reprogramming needs.
- If necessary, replace the TCM following the manufacturer's instructions.

5. Reconnect Battery

Reconnect the battery terminals and ensure they are securely fastened.