Whistling noise

2005 VOLKSWAGEN JETTA
163,000 MILES • 2.5L • 4 CYL • 2WD • AUTOMATIC
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JETTA2.5
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There is a whistling noise coming from the bottom of the engine. It does not whistle when cold nor when accelerating. It is very high-pitched and you can hear it from blocks away. Have replaced thermostat, water pump (not Volkswagen brand) and belts. Mechanic who replaced water pump said it was coming from the transmission, said there is a fan in front of the transmission that helps the brakes. I do not know what to think. Any ideas? Not a turbo. Does have a 2.5L engine, though.
Apr 29, 2018 at 4:54 PM
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STRAILER
  • ✓ASE Certified Mechanic
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Hello,

It sounds like you have a plugged transmission filter or screen. Here is a guide to help you see what you are in for when changing the filter out:

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Here is how it will be for your car (below).

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken
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May 1, 2018 at 11:02 AM
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