how to diagnose Ford Explorer Fifth Generation (2011-2019) transmission problems

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

553 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 problems in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with symptoms and solutions.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always disconnect the battery before working on electrical systems.
•Allow the engine to cool before attempting to remove the transmission fluid pan.

Symptoms

•Check engine light illuminated
•Slipping transmission during acceleration
•Rough or harsh shifting between gears
•Delayed engagement when shifting from park to drive
•Unusual noises (grinding or whining) when the vehicle is in gear
•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 (color, odor, and debris).
3
Inspect the transmission for visible leaks or damage to components.
4
Test the battery voltage and charging system to ensure proper voltage is supplied to the transmission control module.
5
Perform a road test to replicate symptoms and determine when they occur (e.g., during acceleration, deceleration, or shifting).
6
Inspect wiring and connectors related to the transmission for corrosion or damage.

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
•Fluid catch pan

Parts Required

•Transmission fluid (Mercon LV)
•Transmission filter (if applicable)
•Gasket for transmission pan
•Solenoids (if testing shows they are faulty)

Related Faults

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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 (color, odor, and debris).
3
Inspect the transmission for visible leaks or damage to components.
4
Test the battery voltage and charging system to ensure proper voltage is supplied to the transmission control module.
5
Perform a road test to replicate symptoms and determine when they occur (e.g., during acceleration, deceleration, or shifting).
6
Inspect wiring and connectors related to the transmission for corrosion or damage.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the negative battery cable to prevent electrical shorts.

2. Fluid Change

Sub-steps:
1. Remove the transmission fluid pan by unscrewing the bolts using a socket set.
2. Allow the old fluid to drain completely into a suitable container.
3. Replace the transmission filter if applicable, ensuring that the old gasket is completely removed.
4. Reinstall the pan with a new gasket, tightening bolts to the manufacturer's torque specifications (typically around 10-12 ft-lbs).
5. Refill the transmission with new fluid as specified in the owner's manual (usually Mercon LV for this model).

3. Electrical Inspection

Sub-steps:
1. Visually inspect the wiring harness and connectors for any signs of wear or damage.
2. Use a multimeter to check the resistance of the transmission solenoids and ensure they are within specifications.
3. If necessary, replace any faulty solenoids or connectors.

4. Transmission Control Module (TCM) Reset

Sub-steps:
1. Reconnect the negative battery cable.
2. Start the engine and allow it to idle for a few minutes.
3. Perform a TCM reset by disconnecting the battery for approximately 30 minutes (this can help clear any stored codes and reset the transmission adaptations).