Noise above 30mph

[Tarekith]

I've had neighbors tell me they could hear it when I drove past on really hot days last summer. I don't have the air dam on my 4R, so it's not that. I'm 100% sure it's not some kind of wind noise, it has a very metallic quality to that sounds more like a bad bearing or belt pulley. And it doesn't get that much louder at higher speeds or with a crosswind.

Very high pitched, like nails on a chalkboard frequencies. 4-6kHz

We're just getting into a real cold snap where I live, but I'll try and record some video of it once things warm up. There's been other posts here where people used their phones to capture it from inside the 4R when they were driving too.

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[kehyler]

I wonder if it's at wheel speed, driveline speed, or airspeed...

 

[watchbuzz]

I’ve noticed something similar. Maybe the same. I assumed it was wind noise. The sound persists when the car is on or off throttle. Most noticeable at 35mph. Tapers (or get drowned out) around 55mph. I can still hear it even when costing in neutral, which should rule out the drive line.

I am thinking it's something in/around the brakes. I haven't tried a light application of brakes at speed... that would be the tell there.

For bearings, I guess at speed swerving back and forth would be the test to run.

 

[Tarekith]

Applying brakes lightly here doesn’t change anything, it happens no matter what I do when it’s warm out and I’m over about 25MPH.

 

[Van Solo]

Does anyone here have their air dam?

Tacoma folks have an issue. They talk about a hum though.



**Someone needs to record a drive by to see if you can hear it from the curb

Those are drain holes (?) Not sure we should be covering them up ?

 

[watchbuzz]

I was wondering. I guess in California it wouldn’t matter much.

 

[kehyler]

No change with engine rev in neutral, no change in neutral, and no change in light brake application for me.

Who wants to jack up all 4 wheels and put them on 30 mph to rule out wind? ha.

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