Constant Whine while driving

[Ejforan]

I have been hearing a somewhat faint whining noise while driving that starts at about 23mph and then changes tone around 28mph. It does not change frequency with speed besides the single tone change. It still whines if I shift to neutral, let off the gas, and/or am braking as long as I am above 23. I revved the jeep to above 2k rpm while parked and there was no noise. I also pulled off the soft top to see if it changed and it did not. Shifting into 4wd didn't change anything either.

It seems like that would mean it is something in the drivetrain after the transfer case. I haven't pinpointed where the noise is yet but I feel like it is coming from the front, really hard to tell while driving even with my head out the window.

Has anyone experience something like this or know what would be the next thing to check?

 

[macleanflood]

I've used my GoPros to diagnose noises and leaks...

-Mac

 

[CJ with a TJ]

Noise doesn't change with RPM changes, same in every gear/neutral, but seems speed dependant?

Have you checked all of your U Joints? Wheel bearings?

 

[DEValken]

Wife isn't in the passenger seat when this happens, is she?

 

[ejay]

Wife isn't in the passenger seat when this happens, is she?

Beat me to it.

 

[Ejforan]

Noise doesn't change with RPM changes, same in every gear/neutral, but seems speed dependant?

Have you checked all of your U Joints? Wheel bearings?

Not yet, all the wheel bearings have been replaced recently so I hope it isn't one of them.
Timken fronts koyo rears. Axle U-joints were replaced as well. Haven't touched driveshafts though

 

[Ejforan]

I've used my GoPros to diagnose noises and leaks...

-Mac

The go pro is an awesome idea, I will give that a try!

 

[CJ with a TJ]

Not yet, all the wheel bearings have been replaced recently so I hope it isn't one of them.
Timken fronts koyo rears. Axle U-joints were replaced as well. Haven't touched driveshafts though

Well the good news is that I find driveshaft u joints easier to replace than the ones on the front axle.

Happy hunting!!!

 

[TheBoogieman]

Wife isn't in the passenger seat when this happens, is she?

She's stuffed in the Instatrunk while his GF sits up front. Thus, the faint whining noise.

 

[Ejforan]

Took the front driveshaft off today and that did not change anything. I will drop the rear shaft next, probably a bit backwards for difficulty sake but I had the time.

I had someone drive the Jeep while I listened to pinpoint the noise and I am fairly confident it is at-least not coming from the rear axle but could still be the driveshaft.

Thank you all for the tips and jokes thus far!