how to fix the whining noise from the rear end of my Ford Explorer Sixth Generation (2020-present)

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

519 words

Problem Statement

Learn how to diagnose and fix the whining noise from the rear end of your 2020 Ford Explorer. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Suspension

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always disconnect the battery before working on electrical components.
•Allow the vehicle to cool before working on any hot components.

Symptoms

•Whining noise increases with vehicle speed
•Noise may change pitch when turning
•Vibrations or humming felt through the floorboard
•Unusual wear on rear tires
•Possible leaking fluid around the rear differential

Diagnostic Steps

1
Inspect the rear differential fluid level and condition.
2
Check for any visible leaks around the rear differential and axle seals.
3
Examine the rear wheel bearings for play or roughness by spinning the wheels.
4
Test drive the vehicle to identify when and how the noise occurs (speed, turning).
5
Use an OBD-II scanner to check for any 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

•Socket set
•Fluid pump
•Catch pan
•Wheel bearing puller
•Torque wrench
•OBD-II scanner

Parts Required

•Differential fluid (75W-90)
•Wheel bearings (if replacement is necessary)
•Differential cover gasket (if damaged)

Related Faults

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Diagnostic Steps

1
Inspect the rear differential fluid level and condition.
2
Check for any visible leaks around the rear differential and axle seals.
3
Examine the rear wheel bearings for play or roughness by spinning the wheels.
4
Test drive the vehicle to identify when and how the noise occurs (speed, turning).
5
Use an OBD-II scanner to check for any related error codes.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and secured with wheel chocks.
Disconnect the battery to avoid electrical shorts.

2. Inspect and Replace Differential Fluid

Tools Required: Socket set, fluid pump, catch pan.
Sub-steps:
1. Remove the differential cover bolts using a socket set.
2. Drain any old fluid into a catch pan.
3. Clean the differential cover and the mating surface.
4. Refill with the recommended differential fluid (typically 75W-90) using a fluid pump.
5. Reinstall the differential cover and torque bolts to manufacturer specifications (typically around 20-30 ft-lbs).

3. Inspect and Replace Wheel Bearings (if necessary)

Tools Required: Wheel bearing puller, socket set, torque wrench.
Sub-steps:
1. Lift the rear of the vehicle and securely support it on jack stands.
2. Remove the rear wheels using a socket set.
3. Inspect the wheel bearings for play by wiggling the wheel horizontally and vertically.
4. If bearings are worn, remove the hub assembly using a wheel bearing puller.
5. Replace with new wheel bearings and reassemble the hub, ensuring to torque to manufacturer specifications.

4. Test Drive

After completing repairs, reconnect the battery.
Conduct a test drive to ensure the whining noise has been resolved.