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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

600 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 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 electrical systems.
•Allow the engine to cool before starting work on the transmission.

Symptoms

•Transmission slips or hesitates during acceleration
•Engine revs higher than normal without an increase in speed
•Delayed engagement when shifting from park to drive or reverse
•Check engine light may be illuminated
•Unusual noises such as grinding or whining from the transmission
•Fluid leaks under the vehicle

Diagnostic Steps

1
Use an OBD-II scanner to check for any stored error codes related to the transmission.
2
Inspect the transmission fluid level and condition; look for signs of contamination or burnt smell.
3
Check for any visible leaks around the transmission pan, seals, and lines.
4
Test the transmission range sensor to ensure it is functioning correctly.
5
Inspect the throttle position sensor to confirm it is providing accurate readings.
6
Perform a road test to confirm the symptoms and note the conditions under which they occur.

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
•Fluid pump
•Socket set
•Drain pan
•Multimeter

Parts Required

•Transmission fluid
•Transmission filter (if applicable)
•Transmission range sensor (if required)
•Throttle position sensor (if required)

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Symptoms

•Transmission slips or hesitates during acceleration

•Engine revs higher than normal without an increase in speed

•Delayed engagement when shifting from park to drive or reverse

•Check engine light may be illuminated

•Unusual noises such as grinding or whining from the transmission

•Fluid leaks under the vehicle

Diagnostic Steps

1
Use an OBD-II scanner to check for any stored error codes related to the transmission.
2
Inspect the transmission fluid level and condition; look for signs of contamination or burnt smell.
3
Check for any visible leaks around the transmission pan, seals, and lines.
4
Test the transmission range sensor to ensure it is functioning correctly.
5
Inspect the throttle position sensor to confirm it is providing accurate readings.
6
Perform a road test to confirm the symptoms and note the conditions under which they occur.

Solution

1. Preparation

Gather tools and parts required for the repair.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to prevent any electrical short circuits.

2. Check and Replace Transmission Fluid

Tools Required: Fluid pump, socket set, drain pan.
Sub-steps:
1. Place a drain pan under the transmission pan.
2. Remove the transmission pan bolts and carefully lower the pan to drain the fluid.
3. Clean the pan and magnet to remove any metal shavings.
4. Replace the transmission filter if applicable.
5. Reinstall the pan with a new gasket and torque bolts to the manufacturer's specifications (typically 12-15 ft-lbs).
6. Refill the transmission with the correct type of fluid (check owner’s manual for specifications).

3. Inspect and Replace Transmission Range Sensor (if necessary)

Tools Required: Socket set, wiring harness connector tool.
Sub-steps:
1. Locate the transmission range sensor, usually mounted on the side of the transmission.
2. Disconnect the electrical connector.
3. Remove the mounting bolts and carefully remove the sensor.
4. Install the new sensor in reverse order, ensuring it is aligned correctly.
5. Reconnect the electrical connector.

4. Inspect and Replace Throttle Position Sensor (if necessary)

Tools Required: Socket set, multimeter.
Sub-steps:
1. Locate the throttle position sensor on the throttle body.
2. Disconnect the electrical connector.
3. Remove the mounting screws and take out the old sensor.
4. Install the new sensor and reconnect the electrical connector.
5. Use a multimeter to verify the sensor is sending the correct voltage signals.