Driveline howling like The Black Keys

Nothing inside but the spider gears spin unless you use FWD.

 

Noise is present to a certain volume in all gears.

 

Ok that kind of rules out gear box 4 gear is direct drive.

 

I was thinking the same thing. My throwout bearing is on its last legs but I don't think it's capable of howling like this.

 

I mean, if you know it needs to be changed anyway, I would probably just start there

 

For sure. I've just been brain storming with other members on here over a custom hydraulic release bearing setup (not Clutch Masters) to solve the some of the 6-speed woes, thus pushing back the throwout bearing job. I think we've got it all sorted though, so I'll be going ahead with it this fall.

 

I had a sound that resonated through the whole cabin. Nasty loud on the highway and it started at around 20 mph.

Turned out to be a rear wheel bearing.

Edit: my experience having the bearing replaced...

https://www.tacomaworld.com/threads/bending-a-rear-axle.678609/

 

Oh you would know if it was that bad! You would feel it in your foot too.