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

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

594 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 Ford Explorer Sixth Generation (2020-present). 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 opening the transmission system.

Symptoms

•Engine RPM increases without a corresponding increase in vehicle speed
•Harsh or delayed shifting between gears
•Unusual noises during acceleration, such as whining or clunking
•Transmission warning light illuminated on the dashboard
•Poor fuel economy compared to previous performance
•Fluid leaks under the vehicle

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related fault codes.
2
Check the transmission fluid level and condition to ensure it is at the proper level and not burnt or contaminated.
3
Inspect the transmission for any visible leaks or damage to seals and gaskets.
4
Examine the throttle position sensor (TPS) for proper function and calibration.
5
Test the transmission control module (TCM) for proper operation and any software updates.
6
Perform a road test to observe the transmission behavior under different driving conditions.

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
•Funnel
•Transmission fluid pump (optional)

Parts Required

•Transmission fluid (Mercon LV)
•Transmission filter
•Transmission pan gasket
•Throttle position sensor (if applicable)

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Symptoms

•Engine RPM increases without a corresponding increase in vehicle speed

•Harsh or delayed shifting between gears

•Unusual noises during acceleration, such as whining or clunking

•Transmission warning light illuminated on the dashboard

•Poor fuel economy compared to previous performance

•Fluid leaks under the vehicle

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related fault codes.
2
Check the transmission fluid level and condition to ensure it is at the proper level and not burnt or contaminated.
3
Inspect the transmission for any visible leaks or damage to seals and gaskets.
4
Examine the throttle position sensor (TPS) for proper function and calibration.
5
Test the transmission control module (TCM) for proper operation and any software updates.
6
Perform a road test to observe the transmission behavior under different driving conditions.

Solution

1. Preparation

Gather necessary tools and parts for the repair.
Ensure the vehicle is on a level surface and securely supported with jack stands if needed.
Disconnect the battery to prevent electrical shorts during the repair.

2. Transmission Fluid Change

Sub-steps:
1. Remove the transmission drain plug and allow the old fluid to completely drain into a suitable container.
2. Replace the drain plug with a new gasket and tighten it to the manufacturer’s specified torque (consult the service manual for exact values).
3. Remove the transmission fluid dipstick, and using a funnel, add new transmission fluid that meets Ford specifications (typically Mercon LV).
4. Start the engine and let it run for a few minutes, then check the fluid level using the dipstick, adding fluid as necessary.

3. Inspect and Replace the Transmission Filter

Sub-steps:
1. Remove the transmission pan by loosening the bolts with a socket wrench.
2. Carefully lower the pan and replace the filter located inside.
3. Clean the transmission pan and the mating surface before reinstallation.
4. Reinstall the pan with a new gasket and tighten the bolts to the specified torque.

4. Check and Replace the Throttle Position Sensor (if necessary)

Sub-steps:
1. Locate the throttle position sensor on the throttle body.
2. Disconnect the electrical connector and remove the mounting screws of the TPS.
3. Install the new TPS and reconnect the electrical connector.
4. Clear any error codes using the OBD-II scanner and test the throttle response.