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post #1 of (permalink) Old 08-11-2002, 06:27 PM
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Rattle / Vibration type sound?? What the *&@#!

So I've been cruisin' around lately, and noticed a funny noise.

It's like a rattle but a high pitched?? Kinda' like when the heat shield starts to go on the Cats..... and you get that weird rattle???

First think I checked, but that ain't it. I have noticed that it happens at around 2 grand, but not if I'm parked and hold the throttle. Only seems to happen when under load, and I coast then give it some gas...

For the life of me I can't figure it out.

I checked the tranny-fluid, and is a-okay.
but haven't the slightest as where to begin..

I know the wisdom is out there [img]images/icons/wink.gif[/img]
thanks..

--Mark

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post #2 of (permalink) Old 08-11-2002, 08:37 PM
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Re: Rattle / Vibration type sound?? What the *&@#!

U-joints (my first choice for almost any rattle/vibe), exhaust, accessory bearings, lift bracketry, A/C compressor.
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post #3 of (permalink) Old 08-11-2002, 08:45 PM
 
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Re: Rattle / Vibration type sound?? What the *&@#!

I'd say u-joints or waterpump, a/c.. Although I did have a high pitch-rattle when I put my 5.8 in and found out that the fan was nipping the shroud. i just trimmed it no more sound. Also replaced the clutch on the fan, that will make an anoying noise around 2g's.
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post #4 of (permalink) Old 08-11-2002, 09:15 PM
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Re: Rattle / Vibration type sound?? What the *&@#!

my brake pads rattle like a sumbitch when they get past 1/2 worn... consider it
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post #5 of (permalink) Old 08-11-2002, 10:32 PM
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Re: Rattle / Vibration type sound?? What the *&@#!

Thanks guys!! [img]images/icons/wink.gif[/img]
WaterPump - Recently replaced.
A/C - Good.

Could definitely be the brakes / Fan.
It's weird, and certainly *not* consistent.

I don't *feel* it as I did with the U Joints wearing.
It's more audible than a vibrate.

It almost sounds like an electrical arc... or a short circuit.

Really strange.

I'm gonna' try and get it on the lift tomorrow, and look below...
post #6 of (permalink) Old 08-12-2002, 09:44 AM
 
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Re: Rattle / Vibration type sound?? What the *&@#!

i had this really annoying rattle, and i couldnt figure out here it was coming from...it drove me crazy!!!!!!
Then, one day, i was looking around underneath, and grabbed one of the tailpipes, and........bingo!!!

Turned out that a ubolt was over-tightened, and it partially crushed the outlet pipe and tailpipe, and the tailpipe was rattling around!
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post #7 of (permalink) Old 08-12-2002, 09:52 AM
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Re: Rattle / Vibration type sound?? What the *&@#!

RepT...

I'm kinda' thinking Exhaust as well.... [img]images/icons/wink.gif[/img]
It sound's like the Vibes from the FlowMaster are jostling something.

Only thing is , Everything is welded.... Perhaps the muffler itself?? What a pain in the Arse....

And still what seems so confuse the Ba-Jesus outta' me, is that I cannot seem to make this occur in Park / Neutral???? UGH!
post #8 of (permalink) Old 08-12-2002, 12:26 PM
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Re: Rattle / Vibration type sound?? What the *&@#!

I also had an annoying rattle/vibration that I could feel in the drivers seat like it was right below me. After trying to figure out what it was for a long time it turned out to be the exhaust pipe over the transfer case skid plate. When parked there was at least 1/4 inch clearance but when driving at certain speeds it would hit the skid plate which transmitted the vibration to the frame, etc. Very simple fix for a simple problem that about drove me nuts trying to diagnose. [img]images/icons/mad.gif[/img] I finally figured it out when I dropped the skid plate to replace the tranny mount. BTW, mine would only rattle/vibrate under driving load. Don't know if this helps but . . .
post #9 of (permalink) Old 08-12-2002, 01:46 PM
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Re: Rattle / Vibration type sound?? What the *&@#!

"I'm kinda' thinking Exhaust as well...."

It's the muffler bearings!!! DUH!
post #10 of (permalink) Old 08-12-2002, 02:32 PM
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Re: Rattle / Vibration type sound?? What the *&@#!

Thanks Map....
I'm gonna' take a gander hopefully 2n. It sounds really, really similar to my situation, and definitely the *under load* part..
Hopefully this is it! [img]images/icons/wink.gif[/img]

Shilo, you sure about the muffler bearings[img]images/icons/crazy.gif[/img]? I was actually thinking a bad *flux capacitor*, putting out the wrong jigga-watts....
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