Thread: vibration after lowering car

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  1. #1 vibration after lowering car 
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    hey guys just installed a set of b&g lowering springs using stock struts im having a wooble at lower speeds ..i have researched and havent found much on the 5.3s any help would be much appriecated....my car is a 2006 pontiac gxp grand prix 5.3
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  2. #2 Re: vibration after lowering car 
    GrandPrix Junkie machinegunsquid's Avatar
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    Is it mostly during acceleration??

    By lowering the car, you threw off the axle geometry and the car is going to shake some. Get a set of engine/trans spacers to help correct the geometry.

    Also be a solid idea to go get the car's tires balanced, and the car aligned. Should help some too.

    And lastly, did you make sure you tightened everything up really well? didn't leave anything loose?

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  3. #3 Re: vibration after lowering car 
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    i just put new wheels and tires on and i bought springs and local gm dealership installed springs and did a four wheel alignment i also put a shorter dog bone on too and that didnt help wobble and also installed pogo washers too ...ihavent done the spacers yet ....
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  4. #4 Re: vibration after lowering car 
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    who sells spacers for the 5.3 gxp
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  5. #5 Re: vibration after lowering car 
    GrandPrix Junkie machinegunsquid's Avatar
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    Not sure about the 5.3, but you can go buy some metal stock, and cut/drill your own. That's what I did.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  6. #6 Re: vibration after lowering car 
    GXP Level Member 91parkave's Avatar
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    Toss the shorter dog bone our engine mounts are a a different ball game compared to the 3.8 guys by putting that shorter do gone means you had to severely compress the front lower mount and stretched the rear Mount...not good
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  7. #7 Re: vibration after lowering car 
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    So the spacers should cure it?i got the short dog bone from zzp racing he lead me that way instead of spacers im new to the front wheel drive stuff...
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  8. #8 Re: vibration after lowering car 
    GrandPrix Junkie Sandman's Avatar
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    Spacers will do it. I'm tucking tire now and don't get any vibration with spacers.
    05 Saab 9-2X Linear (Saabaru)
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    Quote Originally Posted by TLSheff View Post
    You said "I'm done with it"... car says "Oh, really? *trollface*"
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  9. #9 Re: vibration after lowering car 
    GXP Level Member 91parkave's Avatar
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    I'm telling you you won't even need spacers if anything just get those lower mounts replaced first OK m lowered on SSC with no vibration whatsoever. Oh and I have a Gxp too. Toss the short dog bone put the OEM one back.
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  10. #10 Re: vibration after lowering car 
    GrandPrix Junkie Sandman's Avatar
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    B&G springs are much lower than SSC springs. I'm not surprised you're not feeling vibrations. He'll need spacers. I needed them with my Eibachs
    05 Saab 9-2X Linear (Saabaru)
    77 Morris Garage B
    Quote Originally Posted by TLSheff View Post
    You said "I'm done with it"... car says "Oh, really? *trollface*"
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  11. #11 Re: vibration after lowering car 
    GXP Level Member 91parkave's Avatar
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    Quote Originally Posted by Sandman View Post
    B&G springs are much lower than SSC springs. I'm not surprised you're not feeling vibrations. He'll need spacers. I needed them with my Eibachs
    Were on bilsteins though spring perch sits higher. Than regular 97-03 with the same combo.
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  12. #12 Re: vibration after lowering car 
    Turbo is the way to go. REDCRAPGP's Avatar
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    Spacers would also help by putting the cv axles back in the correct pistons.

    As cheap as speakers are its worth the little effort.

    And of course check your mounts while you're at it.
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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