Hello,
The CVT is a possibility, but a rotational noise that coincides with vehicle speed could also just be a bad wheel bearing or tire noise. At approximately what speed does the noise begin, and does it go away at any speed?
2012 altima engine/transmission noise help
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 !
Fred
Fred
1 - 14 of 14 Posts
The CVT is a possibility, but a rotational noise that coincides with vehicle speed could also just be a bad wheel bearing or tire noise. At approximately what speed does the noise begin, and does it go away at any speed?
its not noticeable at all at lower speeds, around 20 or 30 km/h you can start to hear it and it tops out its loudness around 80 km/h maintains the noise with the speed, as my speed comes down so does the noise, rpms and everything seems normal and no real issues with performance but the noise gets loud and is definitely concerning
I had it in to my old mechanic before he retired, I thought it might be a variable timing valve or something but he didn't seem to think so, he referred to the sound as "airplane noise" though
could a bad wheel bearing sound like engine or transmission whine?Hello,
The CVT is a possibility, but a rotational noise that coincides with vehicle speed could also just be a bad wheel bearing or tire noise. At approximately what speed does the noise begin, and does it go away at any speed?
Engine noises and transmission pump whining noises are typically RPM-dependent rather than speed-dependent. If you can get a recording of the sound, we might be able to help you out more.could a bad wheel bearing sound like engine or transmission whine?
I found a couple youtube videos with Altima's that had bad wheel bearings and the sound was identical so im starting to think thats the issue, the noise is 100% speed based and not rpm basedEngine noises and transmission pump whining noises are typically RPM-dependent rather than speed-dependent. If you can get a recording of the sound, we might be able to help you out more.
From your description of the whining sound, it well could be a worn chain in the CVT. To enhance longevity, the CVT fluid should always be replaced every 30,000 mi. When the fluid stays in too long, the chemical properties of the fluid get compromised and it can no longer provide that cushion that's so needed between the steel belt and the cones. The fluid has two great enemies, overheated fluid is one of them caused by excessive jack-rabbit starts, pulling a heavy load, being stuck in snow trying to get out, etc. The other is shearing force generated by normal operation of the belt, which increases on hills or with a load. This gradually breaks down and shortens the long-chain molecules that cushion the belt. You can generally deduce that by looking at the fluid; if it's very dark brown and has a burnt odor, it's shot! Anybody who believes the advertising about "lifetime fluid" is doomed to a dead tranny around 100K, maybe less.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 !
Fred
One of the first things to do is perform an CVT/TCM code readout with a portable scan tool that can read CVT codes (not all of them can). To be able to read CVT codes, download a copy of the CVTz50 app for an android smartphone and get a VeePeak VP11 adaptor for your OBD-II port (the VP11 is the cheapest ELM327 that works correctly with CVTz50, not all of them do). With that, you can read any CVT codes yourself, read the CVT temperature in realtime, and also check the CVT-A/CVT-B count for any history of overheating. If something bad did happen, at least you'll get an inkling of what it was from the past evidence by seeing that the counts are greater then zero.
Fred, I have the identical problem. When you find the solution could you post it here or message me.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 !
Fred
Thanks,
Marc
Figured it out, turned out to be bad front wheel bearings and a seized break caliperFred, I have the identical problem. When you find the solution could you post it here or message me.
Thanks,
Marc
Thanks Fred, glad it wasn't the CVT.Figured it out, turned out to be bad front wheel bearings and a seized break caliper
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 ! Fred
i have the same peoblem.. just change ur pvc vavleMy 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 !
Fred
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