why is my Ford Explorer transmission slipping when accelerating

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

510 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 slipping transmission issues in Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is on a level surface and use wheel chocks to prevent movement.
•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening the transmission system.

Symptoms

•Check engine light illuminated
•Harsh or delayed shifting
•Engine revs without corresponding acceleration
•Transmission fluid may be leaking
•Unusual noises (grinding or whining) during acceleration
•Poor fuel economy

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related codes.
2
Check the transmission fluid level with the engine running and the transmission in park; look for discoloration or a burnt smell.
3
Inspect the transmission fluid for leaks around the transmission pan and seals.
4
Examine the transmission filter for blockages or contamination.
5
Test the throttle position sensor (TPS) for proper voltage output.
6
Inspect the wiring and connectors to the transmission control module for damage or corrosion.

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
•Torque wrench
•Transmission fluid pump
•Fluid catch pan
•Multimeter

Parts Required

•Transmission fluid
•Transmission filter
•Transmission pan gasket
•Throttle position sensor (if required)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related codes.
2
Check the transmission fluid level with the engine running and the transmission in park; look for discoloration or a burnt smell.
3
Inspect the transmission fluid for leaks around the transmission pan and seals.
4
Examine the transmission filter for blockages or contamination.
5
Test the throttle position sensor (TPS) for proper voltage output.
6
Inspect the wiring and connectors to the transmission control module for damage or corrosion.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, torque wrench, transmission fluid pump, fluid catch pan.
Safety Warnings: Ensure the vehicle is on a level surface and use wheel chocks to prevent movement.

2. Check and Replace Transmission Fluid

Sub-steps:
1. Remove the transmission dipstick and wipe it clean.
2. Insert the dipstick back into the tube, remove again, and check the fluid level. Add fluid if low.
3. If the fluid is dark or smells burnt, proceed to drain and replace the fluid.
4. Place a catch pan under the transmission pan and remove the pan bolts with a socket wrench.
5. Allow the fluid to drain completely, then remove and inspect the transmission filter.
6. Replace the filter with a new one, ensuring that the gasket is in good condition. Reinstall the transmission pan and torque the bolts to manufacturer specifications.

3. Inspect and Replace Components

Sub-steps:
1. Inspect the throttle position sensor (TPS) using a multimeter. If readings are outside specifications, replace the TPS.
2. Check for any damaged wiring or connectors going to the transmission control module and repair as necessary.
3. If slipping persists, consider rebuilding or replacing the transmission based on the severity of internal wear.