how to diagnose Ford Explorer Fifth Generation (2011-2019) with a transmission fluid leak

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

581 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 a transmission fluid leak in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with symptoms and repair instructions.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is on a level surface and properly supported before starting work.
•Allow the engine to cool down before working on the transmission.
•Disconnect the battery before working on electrical components.

Symptoms

•Transmission fluid pooling under the vehicle
•Transmission warning light illuminated on the dashboard
•Slipping or harsh shifting during gear changes
•Unusual noises when the transmission is engaged
•Burning smell from the transmission area
•Low transmission fluid level warning

Diagnostic Steps

1
Visual Inspection: Check the ground under the vehicle for signs of red transmission fluid.
2
Fluid Level Check: Use the dipstick to check the transmission fluid level and condition.
3
Inspect Transmission Pan: Examine the transmission pan for signs of leaks or damage.
4
Check Seals and Gaskets: Inspect input/output shaft seals and the transmission pan gasket for wear or damage.
5
Pressure Test: Use a transmission pressure gauge to determine if internal leaks are present.
6
Scan for Codes: Use an OBD-II scanner to check for any transmission-related error codes.

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

•Jack and jack stands
•Drain pan
•Socket set
•Torque wrench
•Funnel

Parts Required

•Transmission pan gasket
•Transmission fluid (Mercon LV)

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Diagnostic Steps

1
Visual Inspection: Check the ground under the vehicle for signs of red transmission fluid.
2
Fluid Level Check: Use the dipstick to check the transmission fluid level and condition.
3
Inspect Transmission Pan: Examine the transmission pan for signs of leaks or damage.
4
Check Seals and Gaskets: Inspect input/output shaft seals and the transmission pan gasket for wear or damage.
5
Pressure Test: Use a transmission pressure gauge to determine if internal leaks are present.
6
Scan for Codes: Use an OBD-II scanner to check for any transmission-related error codes.

Solution

1. Preparation

Tools Required:
- Jack and jack stands
- Drain pan
- Socket set
- Torque wrench
- Transmission fluid
Safety Warnings:
- Ensure the vehicle is on a level surface and properly supported before starting work.
- Allow the engine to cool down before working on the transmission.

2. Drain Transmission Fluid

Place a drain pan under the transmission pan.
Remove the transmission pan bolts using a socket set.
Carefully lower the pan to drain the old transmission fluid completely.

3. Inspect and Replace Gaskets/Seals

Remove the old transmission pan gasket and clean the mating surfaces on both the pan and transmission case.
Inspect the input/output shaft seals for wear; replace if necessary.
Apply a new gasket or sealant as per manufacturer specifications.

4. Reinstall Transmission Pan

Position the transmission pan back onto the transmission case.
Install and hand-tighten the bolts, ensuring they are evenly distributed.
Use a torque wrench to tighten the bolts to the manufacturer’s specified torque settings (usually around 10-12 ft-lbs, but check the service manual for exact figures).

5. Refill Transmission Fluid

Using a funnel, refill the transmission with the correct type and amount of fluid (typically Mercon LV for this model).
Start the engine and run through the gears to circulate the fluid.

6. Check for Leaks

After refilling, inspect around the transmission pan and seals for any signs of leaking.
Test drive the vehicle to ensure proper operation and check for any further leaks.