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weird rattle in back quarter.. driving me nuts

This is a discussion on weird rattle in back quarter.. driving me nuts within the General Help forums, part of the LSx Technical Help Section category; ever since i have had my TA it was had a BAD rattle at the idle RPM range. when im ...

  1. #1
    Junior Member Circa307's Avatar
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    Angry weird rattle in back quarter.. driving me nuts

    ever since i have had my TA it was had a BAD rattle at the idle RPM range. when im stopped at a red light or something like, the back passenger quater panel or B pillar will rattle loud. drives me nuts i let my gf drive it down the road and i could even hear it from outside the car. Its not my tag or my anntena bc i have taken both of them off and it still does the same thing. I have also taken my spare tire out and my jack. thank you ahead guys...

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    Sleeper Brad(WS/Z0.6)'s Avatar
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    i wish i knew what this was myself...mine does the same thing!!!! i feel like going insane sometimes..i took out the speakers and the panel also...rattle is still there!!!

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    how about the exhaust pipe contacting the gas tank heat shield in the area where it goes over the axle? mine was vibrating at certain low rpm situations. sounded like a rattle sometimes.

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    Senior Member Orcus79's Avatar
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    Could also be hitting the spare tire well to, mine is doing that and I just happened to notice it one day while crawling around doing a small inspection.

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    I would like to know what it is also, I can't find it and it drives me insane every time I drive the car.I turns the radio up so I want here it I have tried to find it and I can't.Also do anyone have dash cracking problems? my TA have three bad cracks in the dash and I don't know what could have caused them. Do anyone sell a dash cover for our cars yet?

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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    I have a cutout, no antenna, nothing in the ass end. All new exhaust bushings.. mine still does it...cutout WILL make you ignore everything...

    The heatshields on mine make a helleva rattle as well when my cutout is rarely capped.

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    Veteran 0rion's Avatar
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    check the heat shields in the back of the car and the panhard bar. The exhaust runs close to both.

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    Sleeper Brad(WS/Z0.6)'s Avatar
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    Quote Originally Posted by Street Fighter View Post
    I would like to know what it is also, I can't find it and it drives me insane every time I drive the car.I turns the radio up so I want here it I have tried to find it and I can't.Also do anyone have dash cracking problems? my TA have three bad cracks in the dash and I don't know what could have caused them. Do anyone sell a dash cover for our cars yet?
    i had a dash cover a couple years back..it was a smoke grey carpet covering...made nicley and fit over the dash perfectly...don't remember where i got it, but i'll dig around for it...i don't ever use it so if ur interested.....lol

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    Member stephen02ws6's Avatar
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    red with black stripes
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    Quote Originally Posted by 0rion View Post
    check the heat shields in the back of the car and the panhard bar. The exhaust runs close to both.
    thats what i was going to say. mine rattles there too.

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    blacker than wesleysnipes
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    shit with a cutout..everything in the interior rattles..i would guess heatsheilding

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    Quote Originally Posted by dklowrider View Post
    how about the exhaust pipe contacting the gas tank heat shield in the area where it goes over the axle? mine was vibrating at certain low rpm situations. sounded like a rattle sometimes.
    if you can get it to do it idling, or have a friend playing with the throttle you can crawl under and use the special heat shield rattle finder/ repair tool like i did. [pry bar]

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    Junior Member Circa307's Avatar
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    OK i go my friend to get up under my car and he said that it was the heat sheild also. so i droped the sheild down and stuffed welding fabric between it and the gas tank. Took it down the road and it still rattled just as bad. Its not my heat sheild. At least i ruled that out. WTF keep the ideas coming guys, thanks

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    Member jambofla's Avatar
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    Quote Originally Posted by Circa307 View Post
    OK i go my friend to get up under my car and he said that it was the heat sheild also. so i droped the sheild down and stuffed welding fabric between it and the gas tank. Took it down the road and it still rattled just as bad. Its not my heat sheild. At least i ruled that out. WTF keep the ideas coming guys, thanks
    Does your car have aftermarket LCA's or Panhard Bar on it?
    Sorry....reread your post and it says rattle at idle.
    Nevermind

  14. #14
    Junior Member Circa307's Avatar
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    yes, it has both LCA and panhard bar. maybe i need to make sure everything in nice and tight underthere.

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    Quote Originally Posted by Circa307 View Post
    OK i go my friend to get up under my car and he said that it was the heat sheild also. so i droped the sheild down and stuffed welding fabric between it and the gas tank. Took it down the road and it still rattled just as bad. Its not my heat sheild. At least i ruled that out. WTF keep the ideas coming guys, thanks
    not that that all things similar are the same, but my exhaust was hitting the heat shield, not the heat shield hitting the car! putting material behind the shield would have made it worse in my case. might be worth checking again.

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    Veteran 0rion's Avatar
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    yeah, just bend that sucker where it's the closest to your exhaust back there. Look right where the exhaust comes over the axle and passes by the panhard bar. That's where it's the closest I think. Look on your panhard for rub marks from the exhaust also. It's pretty tight right in that area.

  17. #17
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    Get some exhaust wrap and put it around the high point of the bend over the axle for about a foot both directions. I did it and my rattle went away.

  18. #18
    Senior Member ss~zoso~ss's Avatar
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    i had a rattle back there once, and it turned out to be a loose sensor for the stock car alarm, it was dangling and banging against the quarter panel

  19. #19
    Junior Member Circa307's Avatar
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    last night i jacked the car up and got up under it while it was running. Almost dies from the fumes tho. lol (needs tune). searched for about 30 min. and found that it was my pass. side exhaust hanger was rattleing with the frame. think god i finally found it. Going to the exhaust shop tomarrow and get that sucker fixed.

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    Quote Originally Posted by Circa307 View Post
    last night i jacked the car up and got up under it while it was running. Almost dies from the fumes tho. lol (needs tune). searched for about 30 min. and found that it was my pass. side exhaust hanger was rattleing with the frame. think god i finally found it. Going to the exhaust shop tomarrow and get that sucker fixed.
    thanks for that. i always thought when people ask for advice with tracking down a problem or something, when they find the cause or figure out a fix, they should come back and share it.

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