If your Subaru Outback makes a loud noise when you accelerate, it is quite conceivable that the alternator belt is the reason of your issue. Also, there will be metal shavings in the bottom of the transmission crankcase at removal. Ok. Can you describe the cvt fluid? Oct 9, 2019. To do this, we will first see what are the reasons of a high pitched noise when accelerating with my Subaru Outback, then what is a whistling or ratling noise at the acceleration of my Subaru Outback, then the sources of a noise that intensifies during acceleration and to finish a noise that stops when I stop accelerating. RELATED: How to find a Vacuum Leak & How to Fix It (8 Easy Steps). The alternator belt is a wearing part that is used to bring power to the secondary components of your Subaru Outbacks engine and although it is less vital than the timing belt it can bring about engine failure if it fails. the symptoms are same as described in "fellglenn's" post above. We are an automotive mechanic blog that helps mechanics and car users to find the most recent and accurate technical and repair information for their cars. It's important to note that during normal driving this mapping is ignored. Blog Post | Subaru Engine Sounds - They All Do That | Car Talk Thats what makes the whining noise when accelerating so alarming. Not a member of our CarTalk Community yet? In my case, one bearing was good, the other was on the way out. The noise is not harmful to the engine or exhaust system. Furthermore, have them stand on both sides of the vehicle to see if the sound is louder on one side or the other. Color and smell? I also show you what to do to fix the problem, and discuss other instances that might cause whining, such as when the car is turning or the engine is idling. When you accelerate you are taking the slack out of the gears so it stops making the noise. Low transmission fluid can cause whining noise in both manual and automatic transmissions. When theres a clogged transmission filter or a restriction on the transmission passages, it can cause several tranny problems. In both cases, replacing the clutch is the only fix. The engine oil tank is located near the brake fluid reservoir. We have outlined the causes of transmission whining noises and the solutions to rectify them. After that, reinstall it following the reverse process. 4 Reasons for Engine Squealing | Hanson Subaru of Olympia Find out the Causes of Grinding Sound When Braking. Thats because youve sealed the entire vehicle, so itll give you a more accurate understanding of which direction the whining is coming from. We recently created this blog site to enable us to share our knowledge with other automotive mechanics and car owners. The easiest way to locate a bad bearing is to remove the serpentine belt and manually rotate all accessories and pulleys to see if the bearings feel good. It could happen because of low transmission fluid level or worn out gears. If the fluid is low, you should fill the reservoir and hunt down the leak before it becomes worse. If its almost time to do an oil change, you might prefer to go ahead with this maintenance task instead. There are multiple bearings used throughout the car that could be causing a whining noise. After that, unbolt the crankcase. If you track down the whining noise to one of the wheel wells, youre off to a great start. The alternator, sometimes called a generator, generates electricity to charge the battery and power all the electric auxiliaries while driving. Theres nothing to worry if it is between the add and full labels. If you start to notice whining as the engine idles, theres probably something wrong. Noise when accelerating on Subaru Legacy - My Noisy Car If you can determine what part of the vehicle the noise is coming from, you have a better chance of repairing it quickly. The most common causes of a whining noise coming from the speakers while accelerating are either from the alternator or an external amplifier. Step 1: Listen for a whining sound as you press the clutch pedal to the floor. The transmission needs 50-70 PSI of pressure to circulate the fluid to every nook and cranny part of the tranny. I usually start Hi there. On automatic transmissions, Further diagnoses and repairs will require dropping the transmission and disassembling it to access faulty components. Hi, I'm Cody - The founder and main author of this site. The whine in my '13 3.6 is not exactly like the one in the video, but I'm 99% sure mine is coming from the center support bearing on the propeller shaft. But if the bearing in your alternator is bad, you can hear it when you accelerate. At the first sign of strange noises, you should stop the vehicle in a safe location and perform a visual inspection. Use a dipstick to find out the correct level of oil. 2. If your transmission level is good, you should look for a bad serpentine belt or a vacuum leak instead. It could also be due to a damaged torque converter, which has been known to whine when failing. It could have become loose or damaged. Don't worry, we're here to help. However, I would definitely do it because it can't hurt. But after youve filled the reservoir, you need to take the time to find the source of the leak, or youll keep coming back to the same problem. It is an internal bearing within the transmission housing.