my Ford Explorer Fifth Generation (2011-2019) transmission slips when I accelerate

Ford Explorer Fifth Generation (2011-2019)

Error Codes

4-8 hours

Time

hard

Difficulty

high

Severity

3 min read

564 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 during acceleration in a Ford Explorer (2011-2019). Step-by-step guide with symptoms and solutions.

Affected Component

Transmission

Estimated Time

4-8 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 or working beneath the vehicle.

Symptoms

•Transmission slips during acceleration
•Engine RPM increases without corresponding vehicle speed
•Delayed engagement when shifting from park to drive or reverse
•Unusual noises (grinding or whining) when accelerating
•Fluid leaks under the vehicle
•Check engine light may be illuminated

Diagnostic Steps

1
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes related to the transmission.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect for any visible leaks around the transmission and under the vehicle.
4
Test drive the vehicle to confirm slipping and replicate the conditions under which it occurs.
5
Perform a visual inspection of the transmission linkage and mounts for any signs of wear or damage.
6
If applicable, check the transmission control module (TCM) for proper function.

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
•Drain pan
•Screwdrivers
•Pliers

Parts Required

•Transmission fluid
•Transmission filter (if applicable)
•Transmission pan gasket
•Internal transmission components (if worn)

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Diagnostic Steps

1
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes related to the transmission.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect for any visible leaks around the transmission and under the vehicle.
4
Test drive the vehicle to confirm slipping and replicate the conditions under which it occurs.
5
Perform a visual inspection of the transmission linkage and mounts for any signs of wear or damage.
6
If applicable, check the transmission control module (TCM) for proper function.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is on a level surface and the engine is cool.
Disconnect the battery to ensure safety during repairs.

2. Fluid Replacement

Sub-steps:
1. Locate the transmission pan and drain plug.
2. Place a drain pan beneath the transmission pan and remove the drain plug to drain the fluid.
3. Remove the transmission pan bolts using a socket set.
4. Carefully lower the transmission pan and replace the filter if applicable.
5. Clean the pan and inspect for metal shavings or debris.
6. Install a new gasket and reattach the pan, tightening bolts to manufacturer specifications (typically 10-12 ft-lbs).
7. Refill the transmission with the appropriate type of fluid (consult owner's manual for specifications).

3. Inspect and Repair Internal Components

Sub-steps:
1. If fluid replacement does not resolve the issue, remove the transmission from the vehicle.
2. Disassemble the transmission according to the service manual.
3. Inspect clutches, bands, and solenoids for wear and damage.
4. Replace any worn components as necessary, ensuring proper assembly.
5. Reinstall the transmission and connect all electrical and hydraulic lines.

4. Reconnect and Test

Sub-steps:
1. Reconnect the battery.
2. Start the vehicle and allow it to warm up.
3. Check for any leaks around the transmission pan and lines.
4. Test drive the vehicle to ensure proper operation and that slipping has ceased.