| Author |
Message |
    
sparhawk
| | Posted on Monday, July 01, 2002 - 11:43 am: | 
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i live on a washboard dirt road, about 3 weeks ago i noticed a vibration noise when i'd go over the washboards.....jump ahead 3 weeks.
it has gotten progressively worse.
96 disco
-it doesn't matter if the truck is warm or cold.
-it now also occurs sometimes on paved roads if i hit a bump.
-i think it occurs most when i am steering to the left (not positive about this one)
-it also seems to happen more often when someone is in the passenger seat.
-it sounds a little bit like if you drag your butt across the bottom of a bathtub (sorry for this one, but it's as close as i can get) that resonating vibrating sound.
-my abs is disconnected.
-if i hit a bump it lasts about 20 seconds or so then goes away.
any thoughts? |
Kyle
| | Posted on Monday, July 01, 2002 - 11:45 am: |
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Sounds alot like the ABS valves doing their thing...
Kyle |
sparhawk
| | Posted on Monday, July 01, 2002 - 12:03 pm: |
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but the abs fuse has been removed.
it's also a different sound than abs activating, it's louder, more mechanical sounding. |
Al Oliveira (Offroaddisco)
| | Posted on Monday, July 01, 2002 - 12:10 pm: |
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Have you checked your bushings? Also check to see that all 4 wheels have no movement other than rotation around the axle. Check lugs. I actually had lugs come undone after a change of tires. |
sparhawk
| | Posted on Monday, July 01, 2002 - 06:56 pm: |
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i'll take a look at the bushings.
but already checked the tightness of the lugs.
any other potential causes? |
Bruce Mac Lennan (Bmac66)
| | Posted on Monday, July 01, 2002 - 07:06 pm: |
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Do you mean a dry bum on a dry bath sound? If so, it could be something loose, like a bracket rattling against a tank, body panel or even bumper bar. If its a high frequency vibe, its probably small and maybe sprung.
Fix number two is crank up the stereo. Good luck.
Bruce |
Palomino
| | Posted on Monday, July 01, 2002 - 07:21 pm: |
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It sounds like the front top bushings. How many miles do you have on the shocks.
Rico |
sparhawk
| | Posted on Monday, July 01, 2002 - 08:31 pm: |
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more of a wet rear in a wet bath tub without any water in it....too graphic, huh?
to the best of my knowledge,the shocks have about 100k on them.....in the last 50k about 5% easy to moderate offroad. |
Mike B.
| | Posted on Monday, July 01, 2002 - 10:38 pm: |
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Steering dampner? Could be loose or broken. Do you also get some vibration coming through the steering wheel? Could a shock be broken.
Thanks,
Mike B. |
jp
| | Posted on Tuesday, July 02, 2002 - 05:28 am: |
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I think 100k on shocks is about past their limit. Also check for swivel pin slop, this will give you shakes/shimmies, and steering damper also should be past its use by date, especially if doing a lot of washboard driving. Check steering balljoints also. I had a shimmie in the front, put it in for swivel pins, turned out it was a near new shock with an inch of dead travel at one end.
jp |
Al Oliveira (Offroaddisco)
| | Posted on Tuesday, July 02, 2002 - 09:13 am: |
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"to the best of my knowledge,the shocks have about 100k on them"
sparhawk, put on a new set of OME shocks and even if the cause of the rattle isn't the shocks (and I think it is) you'll feel like you're driving a new truck. I change my shocks every 30k miles or so. |
sparhawk
| | Posted on Tuesday, July 02, 2002 - 11:04 am: |
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thank you all for your help.
i do one day aspire to have the technical knowledge to be able to return the favor.
see you on the trails!
thanks
greg |
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