Rear end hissing?

[Tucson4runner]

So I was in a drive thru just now and was waiting in line with my window down and I heard a hissing coming from the back of the runner. It wasn't constant more of 1/2 second on and 1/2 a second off. As soon as I pulled out I accelerated then stopped to listen for it and it had gone away. Anyone know what this is? I wouldn't even know what to look at first. Thanks in advance

 

[t4r4life]

So I was in a drive thru just now and was waiting in line with my window down and I heard a hissing coming from the back of the runner. It wasn't constant more of 1/2 second on and 1/2 a second off. As soon as I pulled out I accelerated then stopped to listen for it and it had gone away. Anyone know what this is? I wouldn't even know what to look at first. Thanks in advance

um breather? but the dont make that much noise i think unless its plugged up

 

[Tucson4runner]

Got a pic of what I should see or where to look. I've heard it before but I guess because I was next to a wall it was louder.

 

[NOT ME OR SOMEBODY]

maybe it was nothing from your Runner but a noise from the drive thru?

Anyways check ALL your fluids, coolant,oil,ect. ect.

 

[t4r4life]

i dont think its anything, maybe too hungry and its your stomach lol

 

[IanB]

Pull up next to a wall somewhere and see if you can replicate it, so you can get out and have a poke around to see where it's coming from. Could be anything from what you know at this point.

 

[habanero]

Got a pic of what I should see or where to look. I've heard it before but I guess because I was next to a wall it was louder.

He's talking about the rear differential breather. Look at the top of the rear dif on the driver's side. Should be a thingy poking up just before the axle tube. That'd be the breather. Unless it's extended, then there'd be a hose there that you could follow up to the breather. The cap should be free to wiggle, not all gunked up.


x2 w/ IanB.