why does my Ford Explorer Fifth Generation (2011-2019) transmission slip when accelerating

Ford Explorer Fifth Generation (2011-2019)

Error Codes

4-8 hours

Time

hard

Difficulty

high

Severity

3 min read

525 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 diagnostic procedures and repair instructions.

Affected Component

Transmission

Estimated Time

4-8 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Transmission slips during acceleration
•Unusual engine RPM fluctuations
•Delayed engagement when shifting from park to drive or reverse
•Harsh or erratic shifting
•Check engine light may be illuminated
•Possible fluid leaks under the vehicle

Diagnostic Steps

1
Scan the vehicle's OBD-II system for any error codes related to the transmission.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect for any visible leaks around the transmission and fluid lines.
4
Test the transmission fluid pressure with a pressure gauge.
5
Verify the operation of the throttle position sensor and vehicle speed sensor.
6
Inspect the transmission control module (TCM) for any signs of failure 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
•Torque wrench
•Socket set
•Multimeter
•Transmission fluid pressure gauge
•Funnel
•Drain pan

Parts Required

•Transmission fluid (Mercon LV or specified type)
•Transmission filter
•Gasket for transmission pan
•Solenoids (if necessary)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's OBD-II system for any error codes related to the transmission.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect for any visible leaks around the transmission and fluid lines.
4
Test the transmission fluid pressure with a pressure gauge.
5
Verify the operation of the throttle position sensor and vehicle speed sensor.
6
Inspect the transmission control module (TCM) for any signs of failure or damage.

Solution

1. Preparation

Gather required tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to avoid electrical shocks.

2. Check and Replace Transmission Fluid

Tools Required: Socket set, funnel, drain pan.
Remove the transmission pan by unscrewing the bolts.
Allow the old fluid to drain into the pan.
Inspect the transmission filter; replace it if clogged or damaged.
Clean the transmission pan and magnet.
Reinstall the pan with a new gasket and torque bolts to manufacturer specifications.
Refill the transmission with new fluid according to manufacturer recommendations (usually Mercon LV for Ford).

3. Inspect and Repair Transmission Components

Tools Required: Torque wrench, multimeter.
Remove the transmission from the vehicle if internal inspection is needed.
Check clutch packs for wear and replace if necessary.
Inspect solenoids and sensors; replace any that are malfunctioning.
Reassemble the transmission ensuring all components are properly aligned and torqued.

4. Reconnect Battery and Test Drive

Reconnect the battery.
Start the engine and allow it to warm up.
Shift through all gears to ensure smooth operation.
Conduct a test drive to verify that the slipping issue has been resolved.