Author Topic: Transmission whirring / whining noise  (Read 6292 times)

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Offline andrec81

  • S Class
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  • Posts: 6
  • Engine: 2.0L
  • Fuel: Petrol
  • Transmission: Manual
  • Trim: SE-L Nav
  • Year: 2017
Transmission whirring / whining noise
« on: December 05, 2023, 10:53:47 am »
I have a 2017 manual petrol model, 56,000 miles. I've noticed a whining/whirring (I think someone compared it to an electric pencil sharpener noise on another forum) sort of noise whenever the car is moving, increasing in pitch as the revs go up in each gear. If I am stationary and press the clutch in, the noise goes away but starts again as soon as I release the clutch, even in neutral. Interestingly the noise does not go away if I put the clutch in whilst freewheeling. I can't remember if it suddenly started or has always been there but is merely getting louder - bought the car second hand. Any ideas before I go for an expensive diagnostic? Thanks.

Offline Atenzer

  • S Class
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  • Posts: 6
  • Engine: 2.5L
  • Fuel: Petrol
  • Transmission: Manual
  • Trim: Sport
  • Year: 2010
Re: Transmission whirring / whining noise
« Reply #1 on: December 19, 2023, 06:36:10 pm »
My guess would be the clutch release bearing.

Offline andrec81

  • S Class
  • *
  • Posts: 6
  • Engine: 2.0L
  • Fuel: Petrol
  • Transmission: Manual
  • Trim: SE-L Nav
  • Year: 2017
Re: Transmission whirring / whining noise
« Reply #2 on: March 01, 2024, 08:32:10 pm »
Turns out it was definitely something internal in the gearbox, most likely a failed bearing. As diagnosis would involve 2 weeks without the car while a transmission specialist took the gearbox apart, I opted for the similarly priced option of swapping the box for a used one...and the obligatory new clutch.