Noise while driving from under truck? Any ideas? - Ford Powerstroke Diesel Forum

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post #1 of 18 Old 03-03-2012, 02:31 PM Thread Starter
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Noise while driving from under truck? Any ideas?

Just today noticed a " nails on a chalkboard sound " coming from under truck while driving. That's the best way to describe the sound. Kind of sounds like the noise you would hear from squeaky brakes. Thing is, it only happens after letting off accelerator while coasting and also stops when brakes are applied. It is also intermittent but seemed to get a little worse and more frequent today. Any ideas what this could be? Thanks for any help as always!


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2006 F-250 King Ranch Crew Cab Long Bed
146,000 miles and counting....

Mods so far....More to come
ARP Head Studs
Custom Diesel EGR Delete
4" MBRP Turbo Back Straight Piped Exhaust
Zerex CAT ELC Coolant
Updated STC Fitting, Turbo Feed and Drain Tube
PMM Coolant Filter
Blue Spring Upgrade
High Idle Mod
Edge Insight CTS
Edge expandable EGT Probe
Edge Fuel Pressure Sensor
SES SS Billet Grille Inserts
Recon Smoked Cab Light Covers
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post #2 of 18 Old 03-03-2012, 03:45 PM
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Have you had any rear end work done recently, sounds like something is wrong in the rear ring and pinion.

Karl and his 2003 6.0

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WHAT!?! I was trying to list stuff that everyone else
hasn't already listed for their truck!




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post #3 of 18 Old 03-03-2012, 03:54 PM Thread Starter
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No I have not had anything done. I have noticed in rear diff where driveshaft meets diff, there is some wetness like maybe a seal is leaking. No puddles underneath truck however that I've noticed


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2006 F-250 King Ranch Crew Cab Long Bed
146,000 miles and counting....

Mods so far....More to come
ARP Head Studs
Custom Diesel EGR Delete
4" MBRP Turbo Back Straight Piped Exhaust
Zerex CAT ELC Coolant
Updated STC Fitting, Turbo Feed and Drain Tube
PMM Coolant Filter
Blue Spring Upgrade
High Idle Mod
Edge Insight CTS
Edge expandable EGT Probe
Edge Fuel Pressure Sensor
SES SS Billet Grille Inserts
Recon Smoked Cab Light Covers
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post #4 of 18 Old 03-03-2012, 03:59 PM
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Being EMS you know to be careful, but have you tried putting the rear end in the air and see if you can duplicate the noise. Nails on the chalk board is no bueno coming from the rear end.

Karl and his 2003 6.0

Barefoot Accelerator Pedal
TRICO Force wiper blades
Yellow Military Aircraft Valve Stem Caps
Offensive "Stick Family" Decal
Big Ol'Honkin 1 1/4" Shank Receiver Hitch


WHAT!?! I was trying to list stuff that everyone else
hasn't already listed for their truck!




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post #5 of 18 Old 03-03-2012, 04:02 PM Thread Starter
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No I haven't. Don't really feel all that comfortable doing that myself. Could it be caused by low differential fluid? It's not a grinding noise. I might just have to take it to my mechanic and have him check it out


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2006 F-250 King Ranch Crew Cab Long Bed
146,000 miles and counting....

Mods so far....More to come
ARP Head Studs
Custom Diesel EGR Delete
4" MBRP Turbo Back Straight Piped Exhaust
Zerex CAT ELC Coolant
Updated STC Fitting, Turbo Feed and Drain Tube
PMM Coolant Filter
Blue Spring Upgrade
High Idle Mod
Edge Insight CTS
Edge expandable EGT Probe
Edge Fuel Pressure Sensor
SES SS Billet Grille Inserts
Recon Smoked Cab Light Covers
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post #6 of 18 Old 03-03-2012, 04:05 PM Thread Starter
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What do I run the risk of driving it like that if that is problem and is where noise is coming from?


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2006 F-250 King Ranch Crew Cab Long Bed
146,000 miles and counting....

Mods so far....More to come
ARP Head Studs
Custom Diesel EGR Delete
4" MBRP Turbo Back Straight Piped Exhaust
Zerex CAT ELC Coolant
Updated STC Fitting, Turbo Feed and Drain Tube
PMM Coolant Filter
Blue Spring Upgrade
High Idle Mod
Edge Insight CTS
Edge expandable EGT Probe
Edge Fuel Pressure Sensor
SES SS Billet Grille Inserts
Recon Smoked Cab Light Covers
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post #7 of 18 Old 03-03-2012, 04:11 PM
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When I had a 9 inch going south on me, it made a shreaking, whining, ex-wife complaining noise. You know, the kind that makes you wish it would just quit. I urge you to take it in if you can't do this yourself.
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post #8 of 18 Old 03-04-2012, 03:42 AM
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Quote:
Originally Posted by baycountry16 View Post
Just today noticed a " nails on a chalkboard sound " coming from under truck while driving. That's the best way to describe the sound. Kind of sounds like the noise you would hear from squeaky brakes. Thing is, it only happens after letting off accelerator while coasting and also stops when brakes are applied. It is also intermittent but seemed to get a little worse and more frequent today. Any ideas what this could be? Thanks for any help as always!


Sent from my Autoguide iPhone app

Take it to aamco, they will diagnose it for free, then do the work yourself or take it to your normal shop for repair. It may be something simple like a u joint or something that is more involved like a ring or pinion bearing.

good luck!

2005 F-350 4 door long bed dually 4X4 STOCK
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post #9 of 18 Old 03-04-2012, 04:29 AM Thread Starter
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Took a pretty good video of the noise with phone this morning. I'll upload soon when I figure out how to attach video


Sent from my Autoguide iPhone app


2006 F-250 King Ranch Crew Cab Long Bed
146,000 miles and counting....

Mods so far....More to come
ARP Head Studs
Custom Diesel EGR Delete
4" MBRP Turbo Back Straight Piped Exhaust
Zerex CAT ELC Coolant
Updated STC Fitting, Turbo Feed and Drain Tube
PMM Coolant Filter
Blue Spring Upgrade
High Idle Mod
Edge Insight CTS
Edge expandable EGT Probe
Edge Fuel Pressure Sensor
SES SS Billet Grille Inserts
Recon Smoked Cab Light Covers
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post #10 of 18 Old 03-04-2012, 10:51 AM Thread Starter
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Okay here is a video of the sound while I was driving this morning. You can here it pretty clearly occur when I let off the accelerator and am coasting. There is a bit of wind noise interference, but you can still hear it.

I did just the other day install blue spring upgrade and change fuel filters, so I had air filter out, CAC tube off, and upper radiator hose off. It seems like the noise has become worse since I did these things. May just be a coicidence, not sure if I did something by mistake when doing this.

Also, I still can't pinpoint if noise is coming from front or rear, but I think it's coming from rear. What do you all think? Any Ideas?

Here is the link:



2006 F-250 King Ranch Crew Cab Long Bed
146,000 miles and counting....

Mods so far....More to come
ARP Head Studs
Custom Diesel EGR Delete
4" MBRP Turbo Back Straight Piped Exhaust
Zerex CAT ELC Coolant
Updated STC Fitting, Turbo Feed and Drain Tube
PMM Coolant Filter
Blue Spring Upgrade
High Idle Mod
Edge Insight CTS
Edge expandable EGT Probe
Edge Fuel Pressure Sensor
SES SS Billet Grille Inserts
Recon Smoked Cab Light Covers
baycountry16 is offline  
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