Whining sound when accelerating half the time.

I have been experiencing a whining sound when accelerating half the time now while driving my jeep. A friend of mine said it could be an overdrive whine I drive with overdrive on most of the time the manual said it was recommended. I would like to figure out what the issue is and your thoughts on it. Also i don't think there has ever been a transmission service on it I bought it with 30k miles on almost two years ago.

My car has 49887 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hi there:

Although it’s possible that the whining noise might be caused by the overdrive, it’s also possible that this noise is caused by bad or failing wheel bearings. As the wheel bearings begin to age, they will lose lubricity and begin to make a whining or howling sound as the vehicle accelerates. To determine the exact source of this noise, you should have a mobile mechanic complete a vehicle is making a noise inspection first; so they can pinpoint where it’s coming from and recommend the correct repairs.

How to Identify and Fix Common car Problems ?

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

Car Makes Whining Noise When Accelerating

If your vehicle makes a whining noise when you are accelerating, a transmission problem is most likely at fault. Whining when accelerating due to transmission problems can be caused by worn-out gears or low transmission fluid due to a leak.

Low Transmission Fluid: For both manual and automatic transmissions, the primary cause for whining when in gear is low transmission fluid. If the fluid is too low, then the internal components of the transmission are not lubricated properly.
1. A high-pitched squeal when accelerating. If you notice a loud squeal when accelerating, especially if your car is just warming up, it could be that you have a loose or worn fan belt. Usually if your fan belts are worn, it could mean your timing belt needs to be replaced as well.
If you hear a whining noise from your car`s engine, it may mean much the same thing: there`s a component that`s worn out. If these parts break or wear down entirely, they could cause damage, so hearing a whining sound means that it`s time to schedule a service appointment.
A damaged fuel pump might make a loud, whining sound that you`ll hear from your gas tank. The pump may also make this noise if you`re low on fuel or the fuel in your tank is contaminated. The normal noise your pump makes is a low hum.
Strange Noises

If the sound resembles humming, buzzing, or clunking, you may be experiencing transmission failure. Bad automatic transmissions may emit humming, buzzing, or whining noises while manual transmissions have harsher “clunking” sounds.

Fuel injector nozzles can become clogged over time, which can lead to a sputtering engine, slow acceleration and the car not having enough power. Fuel injectors can be cleaned if the problem is caught early, but as the conditions worsens, the injectors may have to be replaced.
If you ever hear growling or whining noises coming from under the hood, you could have alternator problems, which should be checked out by a professional ASAP. This growling or whining sound happens when the belt that turns the alternator`s pulley becomes misaligned or rubs against the side of the pulley.
The alternator has several bearings which allow the alternator`s rotor to spin freely. If these bearings begin to fail, you will notice a loud whining noise, which will increase when you accelerate or the car is under heavier load.
What sound does a bad water pump make? Any high-pitched sound, or an increasingly loud whining sound as you accelerate is usually coming from the car water pump. The same sound happens when a belt is loose, or the bearings are bad. No matter which of these it is, getting your car to the mechanic is a must.
Your car`s clutch is going bad. This whining noise that appears at a particular rpm band (mostly early) means that the clutch is slipping.
Weird Noises

There may be trouble if you suddenly notice a whining noise from your torque converter. This whining noise implies that the pump within the torque converter is no longer functioning as designed. The noise could imply that the blade assembly no longer receives enough fluid.

Should the whining noise of your transmission continue whenever your vehicle is in gear, this can mean there is a problem occurring in your torque converter. Check to see if the noise desists when you shift the vehicle to park or neutral. A constant whining noise when your car is in gear needs professional attention.
1 A high-pitched whining noise that gets worse in reverse could mean that you have a clogged transmission fluid filter. A great test for a clogged filter is to raise line pressure without raising engine rpm. You can do it by shifting into reverse. If the volume goes up in reverse it indicates a clogged filter.
Transmission fluid ensures that the gears shift smoothly, but there will be a clunking sound in manual transmissions and whining sounds from automatic ones if it is low. In such a case, we recommend taking the car to an expert or technician who can pinpoint exactly why the sound is there.
Should the whining noise of your transmission continue whenever your vehicle is in gear, this can mean there is a problem occurring in your torque converter. Check to see if the noise desists when you shift the vehicle to park or neutral. A constant whining noise when your car is in gear needs professional attention.
Whining in a gas cooktop is likely coming from the regulator. The regulator is located at the end of the gas line and regulates the gas pressure that gets sent to the burners. The whining noise can be a sign that gas is struggling to get sent to the burners, especially if you notice signs like a weak flame.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Whining sound when accelerating half the time.
ANSWER : Hi there:

Although it’s possible that the whining noise might be caused by the overdrive, it’s also possible that this noise is caused by bad or failing wheel bearings. As the wheel bearings begin to age, they will lose lubricity and begin to make a whining or howling sound as the vehicle accelerates. To determine the exact source of this noise, you should have a mobile mechanic complete a vehicle is making a noise inspection first; so they can pinpoint where it’s coming from and recommend the correct repairs.

Whining sound accelerating
ANSWER : Hi there, thanks for writing in about your 2007 Volvo V50. On vehicles similar to yours, a whining or whistling noise coming from the engine can be the result of a malfunction in the positive crankcase ventilation system. When the diaphragm for the crankcase pressure regulator fails, this noise can occur. Have the vehicle looked over – especially the previous work done. If you would like to have this checked by an expert, a certified professional, such as one from YourMechanic can diagnose the noise for you and determine what should be done.

A tin metal like rattling sound when I accelerate from a low speed.
ANSWER : Hello. My first inclination would be to say, "torque converter". That is easy to rule in or out as you might be able to get a "free" diagnosis from a transmission shop. I’m not recommending you repair it there but it is not unreasonable to seek advice. The reason for my first inclination is you mention a degradation in acceleration. If the torque converter has an internal fault you could experience poor acceleration along with noise. To rule out obvious simple causes, check the fluid level in the transmission per the instructions in the owner’s manual (follow carefully; otherwise reading will be meaningless). Whether it is the torque converter or another cause (front wheel drive, or engine related for instance), YourMechanic could give you a definitive diagnosis of the rattling sound, after an inspection, and indicate your repair options. Good luck with this.

Whine during acceleration. It stops when leveling speed.
ANSWER : I think the rear differential: the ring-and-pinion gears and bearings specifically, are worn out (especially given your mileage). Your specifics about the conditions under which the whine is heard are excellent for diagnostics – well done! Since the whine increases with road speed and acceleration, it means the ring gear (or pinion) is loose enough through wear that the power over 3000 RPM, or the power to push past higher road speeds (air resistance) accentuate the wear pattern on ring & pinion gears and bearings in the differential (rear). I would recommend a new ring & pinion gear set, and accompanying bearings be installed. To avoid any unncessary repairs, consider YourMechanic, as one of our mobile technicians can come to your home or office to diagnose the noise firsthand and help you make the necessary repairs to your vehicle. Best of luck.

Car makes a metal rattling sound when stepping on the gas. It has gotten worse over time?
ANSWER : Hi there:

There could be multiple issues causing the rattling noise when you accelerate on your Mazda 6 ranging from a loose bracket, to an exhaust pipe that is cracked or even the serpentine or drive belt system that’s causing these symptoms. It’s also possible that motor mounts are starting to show signs of wear. The only way to really know for sure what’s causing this issue is to have a local mobile mechanic complete a car is making a noise inspection.

Whining from timing area after water pump was replaced
ANSWER : Hello.

All three of those are definite possibilities to the source of the noise. If the issue only started after that shop worked on your vehicle then they should be responsible for helping you figure out what the problem is. The issue was not there prior to them touching the vehicle, therefore something they did has to at least be linked to the issue.

I would return to the shop and have them either take care of the noise, or give you a refund so that you can have another shop or technician take care of it. If you decide to do the latter, consider YourMechanic, as one of our mobile technicians can come to your home to pinpoint the noise and help you fix it accordingly.

Car sounds like golf cart when revving and braking; also leaking fluid; sound fades as car warms up
ANSWER : Hello,
There are a number of things that could make an engine noisy when starting up. Depending on the specific type of sound you are referring to, this will determine how to properly diagnose. If there is a bit of a hissing sound, this may be a sign of a vacuum leak. If this is more of a shrieking sound, this may be a sign of a worn out or out of adjustment serpentine belt. If there is a bit of a howling or growling sound, this may be a sign of a worn out or low on fluid power steering pump. A rattling or pinging sound may be caused by an ignition problem. An engine can ping (or knock) due to an improper combustion process. A "spark knock" is the result of combustion occurring too early. Early combustion can occur from carbon buildup inside the combustion chamber, a lean air/fuel mixture, and advanced ignition timing (spark plug firing too soon). A clattering type sound may be a result of improper lubrication in the valve train which could be a more serious problem and should be addressed as soon as possible. I would suggest having an expert from YourMechanic come to your location to diagnose and inspect your vehicle to ensure everything is in proper working order.

My car has a high pitch chirping sound when accelerating. 2010 Subaru Impreza
ANSWER : Hi – your Impreza has a turbocharged engine for enhanced performance. This produces pressurized air for the engine, increasing power. To avoid over-pressurizing the engine, there are boost pressure controls, and a "waste gate" port to vent over-pressure – all electronically controlled. This can produce "chirping-like" noises under acceleration, especially during and after gear changes for manual transmission cars. This is normal behavior, and shouldn’t cause concern. If it seems excessively loud, I would recommend an engine inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.