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2012 altima engine/transmission noise help

1407 Views 13 Replies 6 Participants Last post by  amc49
My 2012 2.5s Altima has been making a hum/whine noise that gets gradually louder with speed and i need to figure this out, at very low speeds its not there, seems to kick around 30 km/h and reaches its loudest around 80km/h, car idles perfectly normal and if I leave the car in park and rev the engine it doesn't appear, the car still drivers perfectly fine but the sound is clearly coming from under the hood, it has 136 000 km on it and im trying to figure out it its a worn gasket or something or the beginning of the cvt transmission death throes, any help is greatly appreciated !

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