Returning from a week of pulling the 5er the 6.0 started developing a fairly loud screech on a hard decel. At least that's the best I can describe it. It throws NO codes, hard nor soft. It's going in as it still has a year left on warranty, but anyone wanna hazard a guess?

Hard decel = accelerate quickly, then back off the go pedal. It sure isn't a turbo fart...not one I've even heard before.

 

Fan clutch bearing.

 

close and maybe...
belt and tensioner

 

You sure it wasn't coming from the passenger's seat Bud? I've gotten a screeching sound from that area on hard decel a time or two.

 

I think many of us can relate Steve!! (that was perrty funny )

 

I get it just for being alive sometimes, LOL

 

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

I get screaching from that area, under all conditions. Thank god for KenWood!

 

I just drive with the right side hearing aid removed!

You guys may have hit the nail on the head..... I didn't hear the fan come on going over that high pass near Hazelton, PA!!!! Could that be why?

 

I choose a loud stereo. I am setting myself up for the future........hearing aid's! In the future I will take my aid's out!

 

Believe me, you DO NOT want hearing aids over normal hearing!

 

I know that, but it seems cheaper than Divorce!

Could the sound you are hearing, be from the fan locked, when sudden Decel, and fan spinning faster than the belt making a squeal? Had a Log Skidder that did this all the time. Fan going faster than the engine=screach from the belt.

 

Guess you haven't priced hearing aids lately!!!!!

 

could It be you Blow off valve going bad?? I had that problem and the noise sounded as if it came from driver firewall area...Loud as all getup on hard-moderate de-cell..

 

Not on a 6.0L!

 

6.0 doesn't have a blow off valve???