how to fix my Ford Explorer transmission slipping during acceleration?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

567 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 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

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening the transmission or handling fluids.

Symptoms

•Transmission slips during acceleration
•Delayed or harsh shifting
•Unusual noises from the transmission (grinding or whining)
•Warning light illuminated on the dashboard
•Poor fuel economy
•Fluid leaks under the vehicle

Diagnostic Steps

1
Check the transmission fluid level and condition using the dipstick; add fluid if low and look for burnt or contaminated fluid.
2
Scan the vehicle's computer system for any error codes related to the transmission using an OBD-II scanner.
3
Inspect the transmission for external leaks, paying close attention to seals and gaskets.
4
Test the transmission pressure using a pressure gauge to ensure it meets manufacturer specifications.
5
Examine the throttle position sensor (TPS) and vehicle speed sensor (VSS) for proper operation.
6
Inspect the transmission filter for clogs or restriction if applicable.

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
•Drain pan
•Socket set
•Multimeter
•Screwdrivers

Parts Required

•Transmission filter (if applicable)
•Transmission fluid
•Gasket for transmission pan
•Throttle position sensor (if needed)
•Vehicle speed sensor (if needed)

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Diagnostic Steps

1
Check the transmission fluid level and condition using the dipstick; add fluid if low and look for burnt or contaminated fluid.
2
Scan the vehicle's computer system for any error codes related to the transmission using an OBD-II scanner.
3
Inspect the transmission for external leaks, paying close attention to seals and gaskets.
4
Test the transmission pressure using a pressure gauge to ensure it meets manufacturer specifications.
5
Examine the throttle position sensor (TPS) and vehicle speed sensor (VSS) for proper operation.
6
Inspect the transmission filter for clogs or restriction if applicable.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to avoid electrical shorts.

2. Change Transmission Fluid

Tools Required: Transmission fluid pump, funnel, socket set, drain pan.
Sub-steps:
1. Place a drain pan under the transmission pan.
2. Remove the transmission pan bolts using a socket, and carefully lower the pan to drain the old fluid.
3. Remove the old filter (if applicable) and clean the mounting surface.
4. Install the new filter and gasket, ensuring proper alignment.
5. Reinstall the transmission pan and torque the bolts to the manufacturer's specifications (typically 10-12 ft-lbs).

3. Inspect and Replace Components

Tools Required: Screwdrivers, multimeter, socket set.
Sub-steps:
1. If the TPS or VSS is faulty, disconnect the electrical connectors and remove the sensor.
2. Install the new sensor and reconnect the wiring harness.
3. Check all wiring and connectors for damage; repair or replace as necessary.

4. Refill Transmission Fluid

Tools Required: Funnel, transmission fluid (type specified by manufacturer).
Sub-steps:
1. Use a funnel to refill the transmission with the correct type and amount of fluid as specified in the owner’s manual.
2. Start the engine and let it idle for a few minutes while cycling through the gears.
3. Check the fluid level and add more if necessary, ensuring it is at the correct level.