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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

615 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 issues in Ford Explorer (2011-2019). 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 any electrical systems.
•Allow the engine to cool before opening the transmission fluid pan.

Symptoms

•Transmission hesitates or slips during acceleration
•Unusual noises (grinding or whining) when shifting gears
•Delayed engagement when shifting from park to drive or reverse
•Check engine light illuminated
•Poor fuel economy
•Fluid leaks under the vehicle

Diagnostic Steps

1
Scan the vehicle's onboard computer using an OBD-II scanner to check for any error codes related to the transmission.
2
Inspect the transmission fluid level and condition; look for signs of discoloration or burnt smell.
3
Check for transmission fluid leaks around the pan, seals, and cooler lines.
4
Test the transmission range sensor and ensure it is functioning correctly.
5
Inspect the wiring and connectors related to the transmission for any signs of damage or corrosion.
6
Perform a road test to observe the transmission behavior under various 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
•Funnel
•Multimeter
•Electrical contact cleaner

Parts Required

•Transmission fluid
•Transmission filter (if applicable)
•Transmission range sensor (if faulty)

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Diagnostic Steps

1
Scan the vehicle's onboard computer using an OBD-II scanner to check for any error codes related to the transmission.
2
Inspect the transmission fluid level and condition; look for signs of discoloration or burnt smell.
3
Check for transmission fluid leaks around the pan, seals, and cooler lines.
4
Test the transmission range sensor and ensure it is functioning correctly.
5
Inspect the wiring and connectors related to the transmission for any signs of damage or corrosion.
6
Perform a road test to observe the transmission behavior under various driving conditions.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to avoid electrical shorts.

2. Check and Replace Transmission Fluid

Tools Required: Socket set, funnel, transmission fluid.
Remove the transmission dipstick and check the fluid level.
If low, add the appropriate type of transmission fluid according to the owner’s manual.
If fluid is discolored or has a burnt smell, proceed to change the fluid.
Drain the old transmission fluid by removing the pan bolts and allowing it to flow into a suitable container.
Replace the transmission filter if applicable and reinstall the pan with a new gasket.
Refill the transmission with new fluid, ensuring it is at the correct level.

3. Inspect and Replace Transmission Range Sensor

Tools Required: Socket set, wrench set.
Locate the transmission range sensor, usually found on the side of the transmission.
Disconnect the wiring harness from the sensor.
Remove the mounting bolts and take out the old sensor.
Install the new transmission range sensor and tighten the bolts to the manufacturer’s specifications.
Reconnect the wiring harness.

4. Examine Wiring and Connectors

Tools Required: Multimeter, electrical contact cleaner.
Visually inspect all wiring and connectors for signs of wear, corrosion, or damage.
Use a multimeter to test the continuity of the wiring from the transmission to the control module.
Clean any corroded connectors using electrical contact cleaner and reassemble.

5. Reconnect Battery and Test Drive

Reconnect the battery and ensure everything is secured.
Start the engine and perform a test drive, paying attention to the transmission's performance.