A whoooo noise on the rear driver side underneath 03 for explorer.

It makes a humming noise from underneath the truck and a mechanic said something about a bar running to the barron I thought it was the muffler but the shop told me that was not the muffler what could this noise be. Also the mechanic said something about the bar or part being just metal to metal that's the noise I hear is he right. When I go over 25 mph it makes the noise .please help

My car has 180000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Humming noises underneath a vehicle could be a metal to metal contact of two objects rubbing fast. This could be a heat shield, an exhaust pipe rubbing on the frame, or a tire that is rubbing the fender. Go under the vehicle and look for anything that looks like it has a raw and rough contact area and that would be the source of noise. If you need further assistance with your vehicle making a humming noise, then seek out a professional, such as one from Your Mechanic, to help you.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

When the wheel bearing in your tires is damaged or deteriorating, it produces a soft humming sound or grinding noise when you change lanes. It`s best to have the wheel bearings replaced as soon as possible to prevent excessive damage and collisions.
The most major issue that a humming noise can mean is a failing alternator. The alternator is responsible for keeping your car`s battery charged and electrical system working, so you should get it repaired immediately.
This could be a drive belt or one of the components driven by the drive belt, such as the power steering pump, air conditioning compressor, water pump, or one of the idlers that hold the belt in place. Air escaping through a leak can also cause a distinct “humming” noise.
If you`re hearing this noise, the issue may be a bad wheel bearing. To confirm it, change the speed of the vehicle. If the noise becomes worse the faster you drive, then it`s almost certainly a bad wheel bearing. If the noise remains the same, then the issue may be the tires instead.
A bad wheel bearing will make a humming sound or a grinding, grating noise as it wears out. But a humming noise could also indicate problems with your transmission, differential, or universal joints, so it`s important to take a closer look or get a second opinion from a professional, if necessary.
A humming or growling noise.

However, this symptom is more often due to worn or damaged wheel bearings, a bad intermediate shaft bearing on equal length halfshaft transaxles, or worn shaft bearings within the transaxle.

Wheel alignment issues, improper tire pressure and other problems can cause wear that creates a humming sound when you drive. If the tires have worn oddly with weird patterns, you can diagnose the likely cause of the wear by looking at the tread. You will need a repair and a new set of tires.
One solution for exhaust drone is adding noise insulation. This won`t address specific frequencies, but it will make things quieter and reduce vibration. Sound deadening can be used to reduce overall decibel level in the cabin. CLD (constrained layer dampener) tiles and other noise insulation, like Dynamat, work well.
Meaning of droning in English

If something makes a droning noise, it makes a continuous low sound that does not change: The insect`s droning buzz is common here in the summer. They heard a low droning sound drifting across the water.

A Low Humming Sound Is Normal

A fuel pump should make that noise. Most people never notice it, because they`re not trying to listen to it. The pump is driven by an electric motor, so of course it will always hum softly when in use.

Only difference between a wheel bearing noise and a rear differential noise would be the fact that the wheel bearing noise will change with wheel speed but usually will not change with load variations (accelerations/decelerations) while the noise from a rear differential will change with wheel speed and load.
If you hear rear end noise including grinding, clunking or rattling coming from your vehicle, you may have a bad differential. This is a common problem that car and truck owners encounter, especially in four-wheel or rear-wheel drive vehicles.
If you hear a loud clunking noise when shifting your vehicle, this is another sign of driveshaft damage.
Some of the most common causes of vibrations in the driveline are slip splines or U-joints being worn, components that are out of balance, misaligned angles or out of phase yokes, getting close to the critical speed range, or yoke ears that are not coordinated with the splines.
If there is a humming noise coming from the transmission, then either a clutch is slipping or a drive shell is broken. First check the fluid to the transmission and make sure that its full and red in color. I recommend servicing the transmission with new oil and a new filter to see if the noise goes away.
Loud or Noisy Transmission

This is characterized by a high-pitched whining noise, a combination of whining and grinding noises, or a strange gurgling noise. Some of these sounds are worse than others, but all are an indication that your transaxle is malfunctioning.

A hum is a sound made by producing a wordless tone with the mouth closed, forcing the sound to emerge from the nose. To hum is to produce such a sound, often with a melody. It is also associated with thoughtful absorption, `hmm`.
These include, for example, the guitar, bagpipes, organs, different stringed instruments, and electronic keyboards. The word “drone” can also be used to refer to the part of an instrument that is used to produce the sound, such as certain pipes in the bagpipes.
Whirring or Whining

Whirring and whining noises from the engine vary as the car runs fast or slow. These sounds can indicate a number of different problems, including a failing water pump, a bad power steering pump, low power steering fluid, a failing alternator, or problems with the air-conditioning system.

Once you notice any sign indicating a bad wheel bearing, avoid exceeding 500 miles with that issue. A failing wheel bearing will increase your difficulty in driving. But with a high-quality wheel bearing, you can drive for another 1000 miles as per the estimate.
Once you notice any sign indicating a bad wheel bearing, avoid exceeding 500 miles with that issue. A failing wheel bearing will increase your difficulty in driving. But with a high-quality wheel bearing, you can drive for another 1000 miles as per the estimate.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

A whoooo noise on the rear driver side underneath 03 for explorer.
ANSWER : Humming noises underneath a vehicle could be a metal to metal contact of two objects rubbing fast. This could be a heat shield, an exhaust pipe rubbing on the frame, or a tire that is rubbing the fender. Go under the vehicle and look for anything that looks like it has a raw and rough contact area and that would be the source of noise. If you need further assistance with your vehicle making a humming noise, then seek out a professional, such as one from Your Mechanic, to help you.

Read Full Q/A … : A whoooo noise on the rear driver side underneath 03 for explorer.

Clicking noise in driver side rear tire
ANSWER : Hello there. It is possible that the clicking is due to the brake job. A few different items can cause the clicking after a brake job. The two most common would be the backing plate rubbing on the the brake rotor or the brake pad backing plate not being installed properly. A qualified technician, such as one from YourMechanic, will be able to inspect the clicking noise and perform any repairs required.

Read Full Q/A … : A whoooo noise on the rear driver side underneath 03 for explorer.

Driver side door lock button not working, and passenger side sliding door makes a buzzing noise
ANSWER : Hi there. These door issues are common on this vehicle. Most of the time the main issue is the master door lock switch on the driver door. It sounds like you already replaced that. As for the sliding door problem, most of the time, this is a failure within the door module or it can be a connection issue.

I typically take the door apart and check the connections on the module and inside of the door just to make sure that there is nothing apparent in there. If the connections and the wiring are fine, then I use a scan tool to check the module to see what the inputs and outputs are doing. If you need to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your door problem and recommend a repair.

Read Full Q/A … : A whoooo noise on the rear driver side underneath 03 for explorer.

What does it mean if my traction control light won’t turn off and I have a creaking noise coming from the rear drivers side tires
ANSWER : Hi There,
The traction control system monitors the steering and stability of the vehicle and engages when loss of traction has been detected. This is done by the use of electronic sensors at each of the four wheels that communicate with the Powertrain Control Module (PCM) regarding steering performance and stability in adverse weather conditions. The traction control system works by reducing engine speed and determining which wheel to apply brake pressure to in order to prevent the vehicle from sliding. The anti-lock braking system and the traction control system work together to maintain the stability of the vehicle. The computer uses this information received from electronic sensors regarding the rotational speed of each wheel, the horizontal motion of the vehicle, and the vertical motion of the vehicle to determine how to direct the traction control system or the anti-lock braking system to best control the vehicle when needed. When this warning indicator light comes on in the dashboard, this could be an indication of several issues such as faulty wheel speed sensors, a faulty steering angle sensor, a faulty rotational speed sensor or a problem with the steering rack. In some cases, the traction control system may simply need to be reprogrammed. I would recommend having a professional from YourMechanic come to your location to properly diagnose your traction control system.

Read Full Q/A … : A whoooo noise on the rear driver side underneath 03 for explorer.

My heater is blowing air through the driver side air vents but is blowing cold air through the passenger side and rear console ven
ANSWER : Hi there:

Climate controlled vehicles have multiple electrical relays that open and close vents to maintain the desired temperature. In some instances, these relays can wear out overtime. However, it’s also common for debris to clog up vents (especially side vents) which may restrict the flow of cool air. The best way to determine why your AC is not working efficiently, it might be best to have a professional mechanic complete a AC inspection; so they can pinpoint the source of your issues and recommend the right repairs.

Read Full Q/A … : A whoooo noise on the rear driver side underneath 03 for explorer.

I can’t roll the rear passenger window up from either the drivers side or the passenger side. Could it be the regulator rather than the switches?
ANSWER : Hi there. If you are hearing a clicking sound as the window is trying to roll up or down, then either the regulator motor is burned and needs replaced or the track that the window rides on is broken. If you need further assistance with your passenger window motor not working, then seek out a professional, such as one from Your Mechanic, to help you.

Read Full Q/A … : A whoooo noise on the rear driver side underneath 03 for explorer.

Driver Side Inner & Outer Tie Rods and driver side strut being bent.
ANSWER : From what you’ve described, the damage was most likely caused from hitting a pot hole. If the damage was from a pot hole on the right side, in some cases it’s possible for the force to transfer over and damage the left side as well. If you’d like a second opinion on this, consider YourMechanic, as a certified technician can come to your home to diagnose your car’s suspension system and confirm these suspicions.

Read Full Q/A … : A whoooo noise on the rear driver side underneath 03 for explorer.

Strong knocking from front driver’s side and passenger side when making turns left OR right.
ANSWER : The steering rack and pinion assembly is mounted in rubber bushings; they may be deteriorated and allowing the rack and pinion to contact the sub frame making the knocking noise.

The other component to look at is the struts upper bearing and rubber bushing. These get dry of lubricant and should be lubed with a teflon grease when installed so the rubber will not get damaged.

Have someone feel the top of the strut mount under the hood while the steering is turned back and forth to see if the knocking or popping is in the strut. The rack and pinion bushings should be inspected from under the vehicle.

If either or both are bad then they will need to be replaced.

A mobile mechanic, such as one from YourMechanic, can come to your home or business to inspect the knocking noise at your home or business.

Read Full Q/A … : A whoooo noise on the rear driver side underneath 03 for explorer.

Eric smoalih

I am a certified master technician with the National Institute for Automotive Service Excellence (ASE), and I have been working as an auto mechanic for over 15 years. I am passionate about my work, and I take great pride in helping people keep their cars running smoothly.