Thread: "CLUNK" suspension noise when i step on it?

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  1. #1 "CLUNK" suspension noise when i step on it? 
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    Alright i have been having this problem for a month or two. When i am driving and put it to the floor there is one loud clunk as the front end picks up. If i roll on the gas there are multiple clunks in quick succession. I just replaced the struts hoping it would be the problem but it didnt fix it. Anyone know what this might be?
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  2. #2 Re: "CLUNK" suspension noise when i step on it? 
     

  3. #3 Re: "CLUNK" suspension noise when i step on it? 
    GTX Level Member 97gtsc's Avatar
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    did u also replace the strut bearings
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  4. #4 Re: "CLUNK" suspension noise when i step on it? 
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    Quote Originally Posted by Bio248 View Post
    need to know more. mod history?
    when i am moving at a constant speed it doesnt happen, so bumps in the road arent whats causing this. it will sometimes do it when i back out of the driveway with my wheel cranked. and i have a 3.5 pulley and supporting mods
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  5. #5 Re: "CLUNK" suspension noise when i step on it? 
    SE Level Member mikesarebetter's Avatar
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    any exhaust mods? mine was hitting initially til i figured out what i did wrong on the install
    2003 GTP, pacesetter headers, colder plugs, zzp pcm for now, CAI, 3.5 pulley and 180tstat
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  6. #6 Re: "CLUNK" suspension noise when i step on it? 
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    Quote Originally Posted by mikesarebetter View Post
    any exhaust mods? mine was hitting initially til i figured out what i did wrong on the install
    yea i have powerlog, 3" dp, and higher flow mufflers
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  7. #7 Re: "CLUNK" suspension noise when i step on it? 
    SE Level Member mikesarebetter's Avatar
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    higher flow mufflers.. haha.. we won't get into that. but i would check that.. when i installed my headers my downpipe was hitting the floor when i would gun it. ended up just flipin stock motor mounts and that was enough to keep it from hitting.. but that's on 2003.. don't know how much differnet the newer ones are. but if flippin mounts is as easy for yours i'd try that.. unless your positive it's not the exhaust
    2003 GTP, pacesetter headers, colder plugs, zzp pcm for now, CAI, 3.5 pulley and 180tstat
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  8. #8 Re: "CLUNK" suspension noise when i step on it? 
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    Quote Originally Posted by mikesarebetter View Post
    higher flow mufflers.. haha.. we won't get into that. but i would check that.. when i installed my headers my downpipe was hitting the floor when i would gun it. ended up just flipin stock motor mounts and that was enough to keep it from hitting.. but that's on 2003.. don't know how much differnet the newer ones are. but if flippin mounts is as easy for yours i'd try that.. unless your positive it's not the exhaust
    well l've had this exhaust for quite a while. and this clunk doesnt sound like it could be that. thanks
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  9. #9 Re: "CLUNK" suspension noise when i step on it? 
    SE Level Member GINOSGTP's Avatar
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    Ive got a 2004GTP and it does the same thing....i was told that it could be a bad motor mount,,,,weather or not thats true i dont know but it does make sence
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  10. #10 Re: "CLUNK" suspension noise when i step on it? 
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    Quote Originally Posted by GINOSGTP View Post
    Ive got a 2004GTP and it does the same thing....i was told that it could be a bad motor mount,,,,weather or not thats true i dont know but it does make sence
    that does make some sense thanks. I might just take it in and see if they find whatever it is
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  11. #11 Re: "CLUNK" suspension noise when i step on it? 
    GT Level Member Gregorius's Avatar
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    Profile says Dogbones. Assuming you flipped 'em. Did the rubber tear out??
    Dude! Full Service Manuals! 2004-'08 User manuals, full docs wiring diagrams trouble codes... go look.
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  12. #12 Re: "CLUNK" suspension noise when i step on it? 
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    Check your lower control arm bushings, the larger one.

    If the larger one separates from the metal can, it hits the craddle and clunks at times.
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  13. #13 Re: "CLUNK" suspension noise when i step on it? 
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    Quote Originally Posted by Gregorius View Post
    Profile says Dogbones. Assuming you flipped 'em. Did the rubber tear out??
    no actually they are just shorter
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  14. #14 Re: "CLUNK" suspension noise when i step on it? 
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    Check the vertical bushing in the lower control arm. How many miles on the car? I'd put my money on that.
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  15. #15 Re: "CLUNK" suspension noise when i step on it? 
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    Quote Originally Posted by xringshooter7 View Post
    Check the vertical bushing in the lower control arm. How many miles on the car? I'd put my money on that.
    124k
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  16. #16 Re: "CLUNK" suspension noise when i step on it? 
    i pay to play badbrad's Avatar
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    yeah man, check the dogbone mounts and the other motor mounts. i got the poly mounts for the dogbones and it greatly reduces engine tilting. now my d/p from my headers are hitting floorboard, fun!
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  17. #17 Re: "CLUNK" suspension noise when i step on it? 
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    it turned out to be a "loose radius bar" that what the shop i took it to said (this was a couple months back btw. i tightened it and now its just fine. This may help someone out in the future
    3.4 pulley, Wizaired intake, 3" catless dp, 160* tstat, Shortened dogbones, Ported manifolds, aftermarket mufflers, 103's, zzp pcm
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  18. #18 Re: "CLUNK" suspension noise when i step on it? 
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    I have a bad clunk when I put mine in reverse and do a quick back up but thats the only time it happens. I think a bad motor mount but Id like to know where this radius bar might be.
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  19. #19 Re: "CLUNK" suspension noise when i step on it? 
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    Quote Originally Posted by greengt View Post
    I have a bad clunk when I put mine in reverse and do a quick back up but thats the only time it happens. I think a bad motor mount but Id like to know where this radius bar might be.
    Thats funny that you would ask about this now. My car has recently developed a clunk when it is put into reverse, it sounds like a mount to me too. So since my radius bar is tight i know this is not it. The radius bar is more of a clunk that happend when i turned the wheel or accelerated heavily never happend in reverse. Let me know if you figure it out
    3.4 pulley, Wizaired intake, 3" catless dp, 160* tstat, Shortened dogbones, Ported manifolds, aftermarket mufflers, 103's, zzp pcm
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