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Rattle

This is a discussion on Rattle within the Suspension and Handling forums, part of the General Help category; Driver side rear... I've replaced just about every suspension part you can think of. I still have this incessant, inconsistent ...

  1. #1
    Member AKA Speedy's Avatar
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    Rattle

    Driver side rear... I've replaced just about every suspension part you can think of. I still have this incessant, inconsistent rattle. It doesn't always make the sound, but I guess If I had to establish a pattern, it seems to make the noise when I'm on uneven roads.

    Also when you push down on the trunk, you get this squeaky rubbery sound.

    Any ideas?

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    Junior Member tdevil55's Avatar
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    Could be anything from the rubber graments on the shocks, to the exaust pipe hitting. All I can say is welcome to the sounds of an fbody.
    02 Z28/LS1 NBM - TIN CAN RACING
    Full bolt on, weight reduction mods, dyno tuned by FROST = 330hp/342tq New PB = 12.74 @109

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    Waiting on the Tree transamtom's Avatar
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    Check the spare tire hold down and the jack.

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    Exhaust where it crosses over top of the panhard brace is a good culprit. The rear heat shields in that area can also rattle.

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    Moderator 35th-ANV-SS's Avatar
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    Adjust your hatch bump stops

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    Member AKA Speedy's Avatar
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    I don't know... it almost sounds like I have a loose DRIVER side tire or the brake rotor is chattering inconsistently. Bottom line the sound is coming from the Driver side and with it comes the feeling like I have an out of round tire on the driver side.

    On the side note was that if the car is parked, you can push on the trunk and as the suspension compresses you can hear a squeak. I tried pushing down on it today with the hatch up and I still get the sound, so Thanks to the guy that said to adjust the bump stops... but it won't help

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    Member AKA Speedy's Avatar
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    Quote Originally Posted by transamtom View Post
    Check the spare tire hold down and the jack.
    Was the first thing I checked... sound is generating on the opposite side

    Quote Originally Posted by tdevil55 View Post
    Could be anything from the rubber graments on the shocks, to the exaust pipe hitting. All I can say is welcome to the sounds of an fbody.
    My car never did this until this winter and I hoped with rising temperatures the sounds would go away, but they haven't.

    Quote Originally Posted by 35th-ANV-SS View Post
    Adjust your hatch bump stops
    read my first more recent post. I hadn't thought to try this, but I popped the hatch and pushed down on the car... the squeaky/rubbery sound still happens.

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    Member AKA Speedy's Avatar
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    Quote Originally Posted by pajeff02 View Post
    Exhaust where it crosses over top of the panhard brace is a good culprit. The rear heat shields in that area can also rattle.
    I've had the heat shield rattle before... it was definitely cheaper sounding. Almost like tin. The Rattle I have now is MUCH deeper... It's more like a chattering.

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    Moderator 35th-ANV-SS's Avatar
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    Did you crawl under it and check where the exhaust crosses over the upper pan hard bar like Jeff suggested? My exhaust was hitting in that area as it comes very close to coming in contact where it goes over the axle. Of course, this would be on the passenger side, not the driver side where you say the sound is coming from though.

    Is the car sitting level when you look at it? Just ruling out the fact that maybe the spring is not seated properly on one side.

    Another thing you could do is crawl under there and look for any fresh, shiny marks on anything metal. This would indicate where two components were rubbing against one another.

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    Member AKA Speedy's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    Did you crawl under it and check where the exhaust crosses over the upper pan hard bar like Jeff suggested? My exhaust was hitting in that area as it comes very close to coming in contact where it goes over the axle. Of course, this would be on the passenger side, not the driver side where you say the sound is coming from though.

    Is the car sitting level when you look at it? Just ruling out the fact that maybe the spring is not seated properly on one side.

    Another thing you could do is crawl under there and look for any fresh, shiny marks on anything metal. This would indicate where two components were rubbing against one another.
    Yeah, I looked at the exhaust, but I have a pan hard bar relocation kit which gives me extra clearance. I also just replaced the shocks with Koni's thinking this would get ride of the noise. It seemed to for the first 10 miles, but nevertheless its still there. I've tried checking for shiny metal marks, but there are none that stand out to me... I am wondering if the bearings are shot on my UMI LCA's.

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    Moderator 35th-ANV-SS's Avatar
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    Well the only other thing that comes to mind since you have new suspension components is perhaps something needs to be torqued down again. LCA's loose, PHB loose, etc.

    Does it definitely sounds like metal on metal?

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    Member AKA Speedy's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    Well the only other thing that comes to mind since you have new suspension components is perhaps something needs to be torqued down again. LCA's loose, PHB loose, etc.

    Does it definitely sounds like metal on metal?
    the chatter YES! If it wasn't for the fact that our rear disks are held in place by the rear tire, I would swear that the right rear disk is wobbling back there, but when I get the Chatter I pick up a slight vibration in the left rear, like my tire is out of balance/out of round.

    Now I have also been mentioning another sound. this sound sounds like a rubbery squeak or a bad mattress/couch squeak. I can manufacture this sound every time I push down on the rear end of the car and make the suspension compress.

    And I tried tightening all my suspension components down too... Worked for about a day... I'm out of ideas, that's why I got on here.
    Last edited by AKA Speedy; 06-19-2011 at 08:59 PM. Reason: more explanation

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    Moderator 35th-ANV-SS's Avatar
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    Maybe you have a bad wheel bearing

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    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Check the king nut on the rear shocks to be sure it's tightened properly, with all the isolaters present and that the bushing is properly squashed..

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    Member AKA Speedy's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    Maybe you have a bad wheel bearing
    That has become my though on this... When I kick the rim... It rattles. Don't know how I would go about replacing that.

    Quote Originally Posted by Smittro View Post
    Check the king nut on the rear shocks to be sure it's tightened properly, with all the isolaters present and that the bushing is properly squashed..
    This sounds like work too... How can I check this? I assume we are talking on top right?

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    Quote Originally Posted by BrianH.WS6 View Post
    That has become my though on this... When I kick the rim... It rattles. Don't know how I would go about replacing that.



    This sounds like work too... How can I check this? I assume we are talking on top right?
    It's not too bad, have to pull the plastic wheel wells and carpet to get to the nut.

    However if they (king nuts) are rusted, stripped, or broken, you'll need to replace the shocks..
    Last edited by Smittro; 06-20-2011 at 05:48 AM. Reason: corrections as per manual

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    Quote Originally Posted by BrianH.WS6 View Post
    And I tried tightening all my suspension components down too... Worked for about a day... I'm out of ideas, that's why I got on here.
    if tightening everything worked for a day I would think it's suspension related, if you have poly bushings (in my experience) they need to be re-lubed every year or 2 or they squeak. I'd drive the rear up on ramps and crawl under while a friend pushes down on the quarter pannel to make the noise you can usually find the noise really quick if it's something you can repeat in your driveway like that. Take it apart lube it up and reassemble.

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    Senior Member tatertot91's Avatar
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    Do you have spherical rod ends on your panhard bar or lcas?

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    Quote Originally Posted by TransAmX2 View Post
    if tightening everything worked for a day I would think it's suspension related, if you have poly bushings (in my experience) they need to be re-lubed every year or 2 or they squeak. I'd drive the rear up on ramps and crawl under while a friend pushes down on the quarter pannel to make the noise you can usually find the noise really quick if it's something you can repeat in your driveway like that. Take it apart lube it up and reassemble.
    I'll have to do that and see if I can track that noise... Now I need a game plan for the chatter

    Quote Originally Posted by Smittro View Post
    It's not too bad, have to pull the plastic wheel wells and carpet to get to the nut.

    However if they (king nuts) are rusted, stripped, or broken, you'll need to replace the shocks..
    I would think they're fine... I just had the shocks replaced not but a little while ago with Koni's. I'm wondering if I blew the driver side shock somewhat out because when I went to 315's I cut the bump stops out and bottomed the suspension out on the exhaust a couple times... the exhaust is on the passenger side though, so it probably saved that shock... wouldn't been there for the driver side one though. I inspected the shock today and there doesn't seem to be any oil running down the side of the shock, or any sign that it might have. Also, the car sits level on a flat paved surface.

    Quote Originally Posted by tatertot91 View Post
    Do you have spherical rod ends on your panhard bar or lcas?
    No, I went with the the poly bushings. The LCA's are non adjustable, the Panhard bar is a single adjustable.

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    Member AKA Speedy's Avatar
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    Oh and sorry for the late reply... I'm in the military and put in some long hours some days.

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