how to tell if my Ford Explorer's transmission is bad

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

562 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 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 battery before working on electrical systems.
•Allow engine to cool before opening the transmission.
•Ensure the engine is cool before working on the transmission.
•Use gloves to avoid contact with old fluid.
•Ensure all fluid is cleaned up to prevent slipping hazards.

Symptoms

•Slipping gears during acceleration
•Delayed or harsh shifting between gears
•Unusual noises (grinding, whining) from the transmission area
•Warning lights on the dashboard (e.g., check transmission light)
•Fluid leaks under the vehicle (reddish-brown fluid)
•Burning smell when the vehicle is in operation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for transmission-related codes.
2
Inspect the transmission fluid level and condition (color and smell).
3
Check for any visible leaks around the transmission pan and seals.
4
Test drive the vehicle to observe shifting behavior and listen for unusual noises.
5
Inspect the transmission fluid cooler lines for damage or leaks.
6
Perform a stall test to assess torque converter 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
•Funnel
•Drain pan
•Seal puller

Parts Required

•Transmission fluid
•Transmission filter
•Gasket or seal kit

Related Faults

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Symptoms

•Slipping gears during acceleration

•Delayed or harsh shifting between gears

•Unusual noises (grinding, whining) from the transmission area

•Warning lights on the dashboard (e.g., check transmission light)

•Fluid leaks under the vehicle (reddish-brown fluid)

•Burning smell when the vehicle is in operation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for transmission-related codes.
2
Inspect the transmission fluid level and condition (color and smell).
3
Check for any visible leaks around the transmission pan and seals.
4
Test drive the vehicle to observe shifting behavior and listen for unusual noises.
5
Inspect the transmission fluid cooler lines for damage or leaks.
6
Perform a stall test to assess torque converter function.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the battery to ensure safety during the repair.

2. Check and Replace Transmission Fluid

Sub-steps:
- Locate the transmission dipstick and remove it.
- Wipe the dipstick clean and reinsert it to check fluid level.
- If low, add the recommended transmission fluid type (check owner’s manual).
- If the fluid is discolored or burnt, proceed to drain and replace.
Tools Required: Funnel, socket set, drain pan.
Safety Warnings: Ensure the engine is cool before working on the transmission.

3. Inspect and Replace Transmission Filter

Sub-steps:
- Remove the transmission pan using a socket set.
- Clean the transmission pan and magnet.
- Replace the old filter with a new one, ensuring proper alignment.
- Reinstall the pan and torque bolts to the manufacturer’s specifications.
Tools Required: Socket set, torque wrench, gasket scraper.
Safety Warnings: Use gloves to avoid contact with old fluid.

4. Address Any Leaks

Sub-steps:
- Inspect and replace any damaged seals or gaskets.
- Tighten any loose bolts on the transmission case.
Tools Required: Torque wrench, seal puller.
Safety Warnings: Ensure all fluid is cleaned up to prevent slipping hazards.

5. Reconnect Battery and Test Drive

Sub-steps:
- Reconnect the battery terminals.
- Start the engine and allow it to warm up.
- Test drive the vehicle under various conditions to assess performance.
Tools Required: None.
Safety Warnings: Ensure all tools and equipment are cleared from the vehicle before driving.