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

599 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 Fifth Generation (2011-2019). Step-by-step guide with symptoms 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 components.
•Allow the vehicle to cool down before working on the transmission.

Symptoms

•Transmission slips or hesitates during acceleration
•Engine RPMs increase without a corresponding increase in vehicle speed
•Harsh or erratic shifting between gears
•Check engine light illuminated
•Fluid leaks under the vehicle
•Unusual noises, such as whining or grinding, when accelerating

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related codes.
2
Check transmission fluid level and condition (look for discoloration or burnt smell).
3
Inspect the transmission fluid for leaks around the seals and pan.
4
Test the transmission solenoids for proper operation using a multimeter.
5
Check the wiring harness and connectors for damage or corrosion.
6
Perform a road test to observe any specific conditions that trigger the slipping.

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
•Jack and jack stands
•Socket set
•Torque wrench
•Multimeter
•Transmission fluid pump

Parts Required

•Transmission fluid
•Transmission filter
•Transmission solenoids (if applicable)
•Gasket for transmission pan

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related codes.
2
Check transmission fluid level and condition (look for discoloration or burnt smell).
3
Inspect the transmission fluid for leaks around the seals and pan.
4
Test the transmission solenoids for proper operation using a multimeter.
5
Check the wiring harness and connectors for damage or corrosion.
6
Perform a road test to observe any specific conditions that trigger the slipping.

Solution

1. Preparation

Gather tools and parts required for the repair.
Jack up the vehicle and secure it with jack stands.
Disconnect the battery before starting work on electrical components.

2. Check and Replace Transmission Fluid

Check Fluid Level:
- Remove the transmission dipstick and wipe it clean.
- Insert it back and remove again to check the fluid level; it should be within the marked range.
Replace Fluid if Necessary:
- If fluid is low, add the correct type of transmission fluid as specified in the owner’s manual.
- If the fluid is contaminated, proceed to drain and replace it.
Drain Fluid:
- Place a drain pan under the transmission pan.
- Remove the transmission pan bolts and carefully lower the pan; allow fluid to drain completely.
Replace Filter:
- Remove the old transmission filter and replace it with a new one.
Reassemble:
- Clean the pan and install a new gasket.
- Reattach the pan and torque the bolts to manufacturer specifications.

3. Inspect and Replace Transmission Solenoids

Remove Transmission Valve Body:
- Follow the service manual to safely remove the valve body from the transmission.
Replace Solenoids:
- Locate the affected solenoids (as identified in diagnostic steps).
- Remove and replace them with new solenoids.
Reassemble Valve Body:
- Reinstall the valve body, ensuring all seals are properly seated and torqued to specifications.

4. Check Wiring and Connectors

Inspect Wiring:
- Visually inspect the wiring harness and connectors for any signs of damage or corrosion.
- Clean or replace any damaged connectors, ensuring tight connections.