Thread: Vibration issues... (05 GP GT 3.8NA)

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  1. #1 Vibration issues... (05 GP GT 3.8NA) 
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    I have been posting about a highway vibration issue I have had for some time now... little bit worse under light accelaration... always present though. Lots and Lots of repairs. Couple weird things I have noticed though are leading me in a new direction. When I was installing the lower engine mount on the passenger side of the engine I had a nightmare of a time aligning the mount bolts. Multiple prybars etc (I am a mechanic... I know sometimes they can be rough, but this was excessive....). Now I am noticing something else... the mounts at the radiator support, and dogbones don't line up quite straight, they are offset... not HORRIBLY... but enough to be noticeable.

    l l <=== Engine Brackets
    / / <=== dogbones
    l l <=== radiator support

    Now I also know the lower section of the lf fender has been recleared, and the front bumper has been repainted... not replaced. Is there a chance I have some accident damage to the body/subframe that I am just not seeing. When I brake torque it, the engine dosn't just rock back and forth, it kind of looks like the lower passnger side slides under and forward... more of a twisting motion then a rocking motion. Even after the mount replacement (all mounts replaced) I am thinking this twisting motion is throwing the drive axles out of align under load on the freeway and causing a driveshaft alignment type vibration.

    I have replace 4 rims, 4 tires, 4 axles (2 sets, both new, not rebuilt...). 4 bearings, 4 struts, and mounts. all engine/trans mounts. All brakes. No loose front end parts.
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  2. #2 Re: Vibration issues... (05 GP GT 3.8NA) 
    GTP Level Member Rico's Avatar
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    Could you please take a picture? My dogbones are slightly offset exactly opposite of yours. \\ It's a 2000 GT with over 200K on it.

    Does the car have cradle spacers by any chance? Check the bushings.

    Check the lower control arm bushings as well.
    Last edited by Rico; 05-09-2012 at 04:42 AM.
    It's a CUMMINS Dodge not a Dodge Cummins
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