Hence, changing this fluid or refilling it can fix this issue. Hello everyone! Hello - if the noise increases with the speed of the vehicle, but only while you are accelerating (as opposed to coasting), the problem is in the drivetrain (transmission or differential). Grinding isn’t always the first indicator of a problem, however. The serpentine belt is given the proper amount of tension by a device called a drive belt tensioner. Just bought an 01 1500 4x4 5.3 extended cab 122k, my first Silverado. When I let off the gas the whine almost turns to a grind and goes away until I tap the gas again. Belt noise can mean the belt is worn or loose. The whining noise got REALLY loud. Not sure exactly where, but seems from the lower part. At this point, it was doing it when turning the wheel and under acceleration. Here are five of the most common reasons your serpentine belt is making noise when cold or accelerating. Grinding Noise. I recommend a vehicle noise inspection performed by a mobile, … Noise is audible in 2-4 gear, under mild acceleration, and seems to be tied to the engine RPMs. Belt noise can also come when one of the pulleys the belt is riding on starts to fail. I've had my YJ (4.0, AX15, NP231) for about a month now and I've had this annoying whining sound while driving. Usually the humming gets louder under acceleration. Whining noise under mild excelleration Hey Dinotheo, I have the same issue with a 2005 FXT with a 2004 STI engine in it. I also did the tranny mount too, but again, the noise was done before any work was done on the car. When I got back to Charleston, I took the car to the dealership to be looked at. Hearing a whirring noise around 10 mph when accelerating or slowing down is likely due to worn or loose pinion bearings. Gear Grinding Hearing an increase in the level of humming noises or gear grinding is a way of knowing almost for sure that you have a worn out differential. Whirring Sound. I am at wits end, did you ever find out what it was? It doesn't seem to be related to RPM or speed but rather how far down I press the pedal, whether I'm starting off in 1st or cruising down the highway in 5th. Golf Cart Making Grinding Noise. This lack of lubrication can appear thanks to leaking fluids for example and will inevitably lead to whining noises when that happens. If you notice your car making a whining noise when accelerating, addressing it early can prevent it from becoming a grind. Knocking Noise The major concern I am having however is with a light rattling/grinding noise when accelerating between 1000 - 2000 RPMs. Operating under 40-50 degree temps, the sound was not as bad. A similar concern to grinding is if your car makes a clicking noise when accelerating and turning a corner at high speeds. Gets quite high pitched before going to the next gear. If the noise increases with road speed, whether accelerating or coasting, it is more likely a wheel bearing. 1) Bad or Worn Tensioner. If you hear a squeaking or grinding noise when driving, it’s likely a universal joint that’s damaged or worn. If your golf cart is making a weird grinding noise while it is running, the issue could be due to bearings. If the fluid is too thick or the level of the fluid is too low, a whining noise may occur. The tensioner is basically a pulley connected to an adjustable pivot. it sound like i have a TC or SC. and when i let off my foot on gas pedal, i didn't hear any whining noise and when i let my foot on the gas pedal again, i can hear that noise again. But its for sure there when I accelerate for a little bit. The other noise you might be accustomed to is that of a loud exhaust system. The grinding noise is coming from the engine bay. When the belt no longer moves smoothly along the pulleys, it makes a noise when the car is accelerating. 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