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18/05/2021 10:40 am
Topic starter
I have a 2010 Toyota Corolla with a 1.8L engine and a 4 speed automatic with 131,000 KM. Transmission fluid was changed around 10,000 KM ago.
This only happens when my vehicle is cold, once it warms up, the sound goes away. It doesn't happen at idle. When accelerating, just as my vehicle is getting up to the RPM that it requires to shift to the next gear, there will be a high pitched whistle. Once the transmission shifts into the next gear, the whistle goes away until it's about to shift into the next gear.
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18/05/2021 11:15 am
You may have vacuum leak. Scotty has some videos on how to find the vacuum leak.
