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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

557 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 opening the transmission system.

Symptoms

•Transmission slips when accelerating
•Engine RPMs increase without corresponding vehicle speed
•Harsh or erratic shifting
•Check engine light illuminated
•Fluid leakage under the vehicle
•Unusual noises during gear changes

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related codes.
2
Check the transmission fluid level and condition; look for burnt smell or discoloration.
3
Inspect the transmission for any visible leaks around seals and gaskets.
4
Test the transmission fluid pressure using a pressure gauge to ensure it is within specifications.
5
Inspect the transmission control module (TCM) for proper operation and connections.
6
Examine the torque converter for proper operation and signs of wear.

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
•Fluid catch pan
•Torque wrench
•Transmission fluid pressure gauge

Parts Required

•Transmission fluid
•Transmission filter (if applicable)
•Gasket for transmission pan
•Clutch packs (if worn)
•Torque converter (if defective)

Related Faults

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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 and condition; look for burnt smell or discoloration.
3
Inspect the transmission for any visible leaks around seals and gaskets.
4
Test the transmission fluid pressure using a pressure gauge to ensure it is within specifications.
5
Inspect the transmission control module (TCM) for proper operation and connections.
6
Examine the torque converter for proper operation and signs of wear.

Solution

1. Preparation

Gather tools and materials such as a socket set, OBD-II scanner, transmission fluid, and a fluid catch pan.
Ensure the vehicle is parked on a level surface and the engine is turned off.

2. Check and Replace Transmission Fluid

Sub-steps:
1. Remove the transmission fluid dipstick and check the fluid level; add fluid if low.
2. If the fluid is dark or has a burnt smell, prepare to replace it.
3. Place a fluid catch pan under the transmission pan.
4. Remove the transmission pan bolts and carefully lower the pan to drain the old fluid.
5. Clean the transmission pan and replace the filter if applicable.
6. Reinstall the pan with a new gasket, ensuring to torque the bolts to manufacturer specifications (typically around 10-12 ft-lbs).
7. Refill the transmission with the correct type of fluid (consult the owner’s manual for specifications).

3. Inspect and Replace Components

Sub-steps:
1. If slipping persists, inspect the clutch packs within the transmission for wear.
2. Replace worn or damaged clutch packs, ensuring to follow specific torque and assembly procedures.
3. If the torque converter is faulty, remove the transmission and replace the torque converter.
4. Reassemble the transmission and reinstall it in the vehicle.

4. Reprogram the Transmission Control Module (if necessary)

Sub-steps:
1. Connect the OBD-II scanner to the vehicle and access the TCM settings.
2. Follow the manufacturer’s instructions to reprogram or reset the TCM.
3. Verify that all connections are secure and clear any fault codes.