my Ford Explorer transmission slips when accelerating, what should I check

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

625 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 to prevent electrical issues during repair.

Symptoms

•Transmission slips when accelerating
•Engine RPMs increase without corresponding vehicle speed
•Harsh or delayed shifting between gears
•Unusual noises from the transmission (grinding or whining)
•Check engine light illuminated

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related faults.
2
Check the transmission fluid level and condition; look for signs of contamination or burnt smell.
3
Inspect the transmission fluid filter for clogs or restrictions.
4
Examine the transmission linkage and cables for proper adjustment and signs of wear.
5
Test the transmission solenoids for proper operation using a multimeter.
6
Inspect the vehicle's throttle position sensor for correct readings and functionality.

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
•Transmission fluid pump
•Fluid catch pan
•Funnel
•Multimeter
•Wrench set
•Socket set
•Torque wrench

Parts Required

•Transmission fluid
•Transmission filter
•Gasket for transmission pan
•Transmission solenoids (if needed)
•Throttle position sensor (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related faults.
2
Check the transmission fluid level and condition; look for signs of contamination or burnt smell.
3
Inspect the transmission fluid filter for clogs or restrictions.
4
Examine the transmission linkage and cables for proper adjustment and signs of wear.
5
Test the transmission solenoids for proper operation using a multimeter.
6
Inspect the vehicle's throttle position sensor for correct readings and functionality.

Solution

1. Preparation

Ensure the vehicle is on a level surface and securely supported with jack stands.
Disconnect the battery to prevent electrical issues during repair.

2. Check and Replace Transmission Fluid

Tools Required: Transmission fluid pump, fluid catch pan, funnel, 10mm socket.
Remove the transmission pan bolts using the socket and carefully lower the pan to avoid spilling fluid.
Inspect the old fluid; if it's dark or has a burnt smell, it needs to be replaced.
Clean the pan and replace the transmission filter, ensuring the new filter is seated properly.
Reinstall the pan with a new gasket and torque the bolts to manufacturer specifications (typically around 10-12 ft-lbs).
Refill the transmission with the appropriate type and amount of fluid (consult owner’s manual).

3. Inspect and Adjust Transmission Linkage

Tools Required: Wrench set, screwdriver, torque wrench.
Locate the transmission linkage and inspect for any signs of damage or misalignment.
Adjust the linkage to ensure it engages correctly with all gears.
Tighten any loose bolts to the correct torque specifications.

4. Test and Replace Transmission Solenoids

Tools Required: Multimeter, socket set.
Disconnect the electrical connector from the solenoids and test each solenoid for resistance with the multimeter (consult specifications for resistance values).
If a solenoid is faulty, remove it according to manufacturer instructions and replace it with a new one.
Reconnect the electrical connectors securely.

5. Inspect Throttle Position Sensor

Tools Required: Multimeter, socket set.
Locate the throttle position sensor and disconnect the electrical connector.
Test the sensor's voltage output while moving the throttle to ensure it provides a smooth voltage signal.
If faulty, replace the throttle position sensor according to manufacturer guidelines.