3rd Gen Poll: Rear End Noise howling when feathering throttle

If axle wrap is bad enough, sure.
Tacomas are notorious for axle wrap...combine that with low diff fluid from the factory...
Maybe try replicating it going down a steep grade.

 

That might give me a reason to drive to the mountains!!

 

Not a roar per se.
Mine is a high pitched bearing whistle type noise; comes on hard at 45 when accelerating.

 

Mine must not be very bad yet. I only hear it on decel, and only from 55mph down to about 50mph. Or, maybe I'm hearing something completely different...

 

Get some real tires. You'll never know if the diff is making noise

 

Maybe my noise really is just the tires. I'm running K02's.

 

Mine is on decel or feathering the throttle slightly. Like if you take pressure off the rear end. More when feathering than hard decel, like when letting off the gas going up a hill.

 

Nope, that is pretty much exactly what you are describing except 60 down to 50. But is is only on deceleration.

 

Howl during decel only, is usually loose pinion bearing preload.

 

Yup.

 

Yeah, it took a couple hundred miles before I was sure that is was making the howling/whirring/woooooo noise again.

 

My noise is pretty faint. I wrote it off as a harmonic resonance in the drivetrain. It might be due to a alignment issue. It could also be due to a bit of gear lash specific to this model.

There is a big difference between a Howl and a hum. Anybody make a recording of the sound?

 

How about someone post a recording, so I know what to listen for?

EDIT: Or just point me to it...

 

Here is the thread where @smitty99 posted a video of the noise. It is in the very first post.

https://www.tacomaworld.com/threads...wling-noise-drivetrain-rear-end-video.439397/

 

Mine is starting to whine now at 37 MPh as well.

 

Yeah mine is doing it constant now 50-65 mph acceleration or deceleration makes no difference it is just howling. Me thinks Toyota needs to go back to solid pinion bearing spacers instead of crush sleaves. I have had the pinion bearing preload slack off on several Toyota third members over the years. All of them were crush sleave equipped. All but one of them I was able to save by tearing them down and swapping the crush sleave out for a solid spacer and a shim pack. The one that I didn't save was my '94 when it had 14k on it under warranty so I let it eat. It had a catastrophic failure that took out the third, drive shaft, fuel tank, shock, load sensing brake valve and a few other things when it came apart. Waiting on parts still for mine.

 

When are you planning on reporting it to the Dealer? I'm dropping mine off this AM.

 

God.....keeping up with this thead stresses me out....

Really hope we get some good news soon.

 

I'm not. I have given up on my Toyota Warranty. Unless something fails, the dealer will do the free maintenance and then I will handle everything else. It is not worth my time to deal with my worthless service department. It will cost me less to work on this truck myself than waste hours in the day when I could be making money, arguing that my tires are not the cause of the problem. And before all of you say take it to a different dealer, I live in the middle of Nevada. The next closest dealer is 3+ hours away.