[HELP!] Have you ever heard this metal on metal noise?

[seatown]

Hello,

This past Saturday I just started hearing this noise...

I haven't tried to get a better idea of where it is coming from, but maybe someone has heard it before?

2009 Yukon

 

[avalonandl]

Either the transfer case pump wings or a bearing.....total guess btw

 

[seatown]

Hmmm like this? https://www.tahoeyukonforum.com/threads/how-to-identify-transfer-cases-at-risk-for-pump-rub.101261/

Wondering what bearings are possibilities.

 

[CaptainAmerica1]

That’s what I was thinking. It’d be faster if it was in the motor… gotta be transfer case. Trans would be faster too

 

[seatown]

shouldn't the TC be static when in park?

 

[CaptainAmerica1]

No. It’s always rotating. It’s bolted directly to the flywheel that’s bolted directly to the crank

 

[Geotrash]

No. It’s always rotating. It’s bolted directly to the flywheel that’s bolted directly to the crank

I think they were referring to the transfer case when they said TC. If it were the torque converter, I would agree with you.

I can't tell from the video but I would want a mechanic's stethoscope to pinpoint where that sound is coming from. I can't think of any way that a transfer case would make that sound just sitting in park.

 

[CaptainAmerica1]

Doh! Sorry I’m not used to the 4wd…

 

[CaptainAmerica1]

Torque Converter would be TCC my fault

 

[Doubeleive]

I would start in the engine compartment, take the serpentine belt off, start it up and see if the noise is still there wont hurt anything to run for a minute with the belt off. sounds like a tensioner or pulley to me, if the noise is gone spin stuff by hand to narrow it down. next thing to check if that's not it is to take a rubber mallet and start smacking the cat's and or heat shields.

 

[Rocket Man]

Sounds like the flex plate to me but it’s so hard to tell.

 

[easymoney]

Hello,

This past Saturday I just started hearing this noise...

I haven't tried to get a better idea of where it is coming from, but maybe someone has heard it before?

2009 Yukon

 

[seatown]

Update:
The exhaust has a shield, and it rusted and made contact with the drive shaft.
Cut the piece off, and now the sound is gone.

 

[Geotrash]

Update:
The exhaust has a shield, and it rusted and made contact with the drive shaft.
Cut the piece off, and now the sound is gone.

Good thing you didn't pull the transfer case! Thanks for following top with your solution.

 

[Rocket Man]

Update:
The exhaust has a shield, and it rusted and made contact with the drive shaft.
Cut the piece off, and now the sound is gone.

I knew it sounded like something rotating and banging, just glad it wasn’t the flexplate!