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02-13-2012, 02:15 PM
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Member
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Join Date: Feb 11, 2012
Location: Dallas, Oregon
Posts: 79
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Chirp, squeak or bird under my 79 Wagoneer hood?
On my way to work (70 mile drive - one way) I began to hear a pitched, drawn out squeak of sorts from under my hood. Once I got off the highway and into town I noticed that I had a chirping sound while maintaining speed at about 30MPH. The chirping is pretty loud and is kind of pulsating.
Thinking it might be a vacuum leak, I goosed it and the sound went away but quickly returned. As I rolled up to a stoplight, it became obvious that the chirping was related to wheel speed because, as I slowed down, so did the pulsating of the sound. It continued to slow down until I came to a complete stop.
When the light turned green, I went on my way and after getting up to speed (about 30) and holding the throttle at that speed the sound returned. I let off the gas a little and the pitch dropped but not the pulsating.
The strange thing is that the chirping seems to pulsate faster than the wheel hub speed. Could this be a wheel bearing?
Any ideas? Thanks in advance.
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02-13-2012, 02:40 PM
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Master Mechanic
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Join Date: Jan 23, 2010
Location: Columbus, GA/Auburn, AL
Posts: 1,108
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Probably a tufted titmouse.
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02-13-2012, 02:42 PM
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Grease Monkey
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Join Date: Feb 01, 2010
Location: Eagle,Colorado
Posts: 283
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I would guess it's a belt, check the tension on them to see if any are loose and see if that helps
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02-13-2012, 02:51 PM
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Member
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Join Date: Oct 12, 2010
Location: Red Bluff, CA
Posts: 46
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If it changes with wheel speed I would look at the ujoints.
__________________
1977 Jeep J20 401 TH400 Quadratrac w/ part time conversion SOA/SF
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02-13-2012, 06:54 PM
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Dragin Az
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Join Date: Oct 17, 2003
Location: Chino Valley, Arizona
Posts: 7,948
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Its the speedo cable. Mine does it also. I think the speedo head will want a shot as well, if I can get up in there... 
To test it, you can disconnect it and see if the noise goes away. |
02-13-2012, 07:25 PM
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FSJ Maniac
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Join Date: Jul 30, 2000
Location: N47° 51' W121° 56'. WA State
Posts: 2,634
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we know where you can get a cat to stick in there  id swap out the belts and clean the pulley groves
__________________
"You think you hate it now - Just wait till you drive it " ( family vacation - car salesman)
Tripwire. 86 Grand. Howell fuel Injected 360. MSD Ignition + Dizzy. 727/228 BJ's 2" Lift and 31's
88 Wrangler Howell TBI and MSD - Borla Headers w/ Cat-back + winch and 31's AND a M416 trailer (-: 
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02-13-2012, 07:25 PM
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Gear Head
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Join Date: Sep 06, 2008
Location: Casper, WY
Posts: 725
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Quote:
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Originally Posted by KansasWoody
I would guess it's a belt, check the tension on them to see if any are loose and see if that helps
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X2. Also look at the brackets and make sure nothing is crooked. I broke both alt and PS pump belts last weekend right after my Wag started making a very similar sound. Turned out to be a broken alt bracket that allowed the alt to twist a bit, causing the pulley to cut the belt, which must have caught the other one and broken it, as well.
__________________
Ron
2005 KJ, Hit-n-Run, 2am 6-17-2012, Totaled. 
1977 SJ J10, 2v304, T18, D20, 37x14s, SOA & SF on tons, still ugly waiting on clutch
1978 SJ Wagoneer, 360, QT, 33x12.5s, lift by Sawzall  NOT Running 
1993 D150 "1-legged dog" DD
Quote:
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Originally Posted by Mars
One man's trans leak is another's penetrating oil  |
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