Thread: Thud under passenger seat,,,,,

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  1. #1 Thud under passenger seat,,,,, 
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    I have a 00 Grand Prix GTP i replaced the rack and pinion strut mounts struts sway bar and control arm bushings i have a clunk under my passengers side floor in the front when i hit the gas it clunks when i hit the breaks it also clunks anyone kno what it is?????....
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  2. #2 Re: Thud under passenger seat,,,,, 
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    Sounds like your front sway bar is cracked on the passenger side.
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  3. #3 Re: Thud under passenger seat,,,,, 
    SE Level Member sheffy's Avatar
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    mine is doing the same damn thing... i changed everything except the subframe bushings..... check those out its pretty easy to check them
    1997 Grand Prix GT (winter car)
    3.8 with no mods
    1995 Mustang GT (summer)
    5.0 with a whole list of bolt ons
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  4. #4 Re: Thud under passenger seat,,,,, 
    GT Level Member Dtrick22's Avatar
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    if everything in the suspension looks alright I would check the motor mount..Mine does something similar but I would describe it as more of a vibration than a clunk, and it is caused from a worn out motor mount. Just haven't gotten around to replacing it though
    2006 GT- S1x, 3.25 MPS, Lucas 42.5, MAF, SD Headers, C5 Brakes, AGX/Vogtland, GMPP sways
    Quote Originally Posted by Wotgtp View Post
    I eat, drink, sleep, and masterbate to grand prix's. Come at me bro.
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