my Ford Explorer transmission slips when accelerating what's wrong

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

551 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. 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 and transmission to cool before beginning work.

Symptoms

•Transmission hesitates or shifts unexpectedly during acceleration
•Engine RPM increases without corresponding vehicle speed
•Check engine light may be illuminated
•Fluid leaks under the vehicle
•Delayed or harsh engagements when shifting into gear

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related faults.
2
Check transmission fluid level and condition; fluid should be at the correct level and not burnt or contaminated.
3
Inspect the transmission fluid for leaks around the pan and seals.
4
Examine the transmission filter for clogs or restrictions that could affect fluid flow.
5
Test the condition of the transmission solenoids with a multimeter to ensure they are functioning correctly.
6
Perform a road test to replicate the slipping condition and observe any additional symptoms.

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
•Wrench set
•Multimeter
•Socket set
•Transmission fluid pump
•Drain pan

Parts Required

•Transmission fluid
•Transmission filter
•Transmission pan gasket
•Transmission solenoids (if needed)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related faults.
2
Check transmission fluid level and condition; fluid should be at the correct level and not burnt or contaminated.
3
Inspect the transmission fluid for leaks around the pan and seals.
4
Examine the transmission filter for clogs or restrictions that could affect fluid flow.
5
Test the condition of the transmission solenoids with a multimeter to ensure they are functioning correctly.
6
Perform a road test to replicate the slipping condition and observe any additional symptoms.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shorts.
Ensure the vehicle is on a level surface and securely lift it with jack stands.

2. Check and Replace Transmission Fluid

Remove the transmission dipstick and check fluid level.
If low, add the appropriate type of transmission fluid (consult the owner's manual for specifications).
If fluid is burnt or dirty, proceed with a fluid change.
- Tools Required: Wrench set, transmission fluid pump, drain pan.
- Procedure:
  1. Place a drain pan under the transmission pan.
  2. Remove the transmission pan bolts and carefully lower the pan.
  3. Drain the old fluid completely.
  4. Replace the transmission filter if applicable.
  5. Clean the pan and replace the pan gasket.
  6. Reinstall the pan and torque bolts to manufacturer specifications.
  7. Refill the transmission with new fluid through the dipstick tube.

3. Inspect and Replace Transmission Solenoids

Locate the transmission solenoids (consult service manual for exact location).
Disconnect the electrical connectors and remove the solenoids.
Test the solenoids with a multimeter to check resistance values.
- Tools Required: Multimeter, socket set.
- Procedure:
  1. If any solenoid shows out-of-spec resistance, replace it with a new solenoid.
  2. Reinstall the solenoids and reconnect the electrical plugs.

4. Test Drive and Monitor

Reconnect the negative battery terminal.
Start the vehicle and allow it to reach operating temperature.
Conduct a test drive to ensure the transmission operates smoothly without slipping.