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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

546 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 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

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening the transmission pan to avoid burns.

Symptoms

•Check engine light illuminated
•Engine revs without corresponding acceleration
•Harsh or delayed shifting between gears
•Unusual noises during gear changes (e.g., whining or grinding)
•Fluid leaks under the vehicle
•Increased fuel consumption

Diagnostic Steps

1
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect the transmission fluid for contamination or debris.
4
Examine the transmission control module (TCM) connections for corrosion or damage.
5
Perform a road test to replicate slipping symptoms and note conditions (e.g., speed, load).
6
Test the transmission speed sensors using a multimeter to ensure proper function.

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
•Multimeter
•Transmission fluid
•Drain pan
•Funnel

Parts Required

•Transmission fluid (OEM recommended type)
•Transmission filter
•Gasket for transmission pan

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Diagnostic Steps

1
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect the transmission fluid for contamination or debris.
4
Examine the transmission control module (TCM) connections for corrosion or damage.
5
Perform a road test to replicate slipping symptoms and note conditions (e.g., speed, load).
6
Test the transmission speed sensors using a multimeter to ensure proper function.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, multimeter, transmission fluid.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to avoid any electrical shorts during the repair.

2. Check Transmission Fluid

Remove the transmission dipstick and wipe it clean.
Insert the dipstick back into the tube, then remove and check the fluid level.
If the fluid is low, add the recommended transmission fluid until it reaches the full mark.
If the fluid is dark, burnt, or has a foul smell, proceed to replace it.

3. Replace Transmission Fluid and Filter

Tools Required: Drain pan, funnel, socket set, new transmission filter.
Place a drain pan under the transmission pan and remove the pan bolts.
Allow the fluid to fully drain into the pan, then remove the pan.
Replace the old filter with a new one, ensuring the new filter is seated properly.
Clean the transmission pan and replace the gasket with a new one.
Reinstall the transmission pan and torque the bolts to the manufacturer’s specifications.

4. Inspect and Repair Electrical Connections

Reconnect the battery and check electrical connections to the TCM and speed sensors.
Clean any corroded connections with electrical contact cleaner.
Ensure all connectors are securely fastened.

5. Test Drive and Monitor

After reassembly, perform a test drive to check for improvements.
Monitor for any slipping or unusual noises during operation.