Power Down Sound - PTU or Another Component

[ImGoose]

A few weeks ago, I posted about a sound I can hear inside the cab. I matched it up to when the truck is decelerating into 3rd gear (around 12-14mph). I figured it was transmission related.

I'm realizing I think I hear the same sound after shutting down the truck. A rotational sound, like a vent is closing.

Video with sound:


Is this normal? I know there's a vent beneath the truck for the Power Takeoff Unit for the AWD system. Is it related to that?

When the truck starts, I also think I can hear the opposite of the sound - like the vent / mechanism is moving. It's just harder to hear in video cause the engine is running.

Sponsored

 

[Big Kahuna]

Mine does it as well, weird noise. I also hear a weird noise a couple of minutes after shutting down. I pulled in my garage, got out, was working at my shop table for 5 mins then the car made a weird power type sound. Second time I’ve noticed this after the car had been off for a while.

 

[ImGoose]

Yeah, same here in the other weird noises. Rattles like there's a squirrel in the electrical system.

Happy I'm not the only one with the "door closing" sound. As you're braking, do you hear it as you slow from 15 and 10 mph? Probably need to be on a quiet road, but am fairly sure it's the same sound.

 

[Barefootdan]

could be the active vents in the front grill? I also hear so many sounds when the truck is parked. I'm always in my garage with my key in my pocket and I'm not sure if the truck thinks I'm approaching/leaving constantly? But I hear the clicking of relays and movement of other stuff as well, seemingly randomly.

Sponsored