Back after long break and vibrating.........

Discussion in 'Technical' started by Mustangnut, Sep 6, 2017.

  1. Mustangnut

    Mustangnut Member

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    Ok so i remembered a few things.
    First was i dont recall any vibration or not nearly as much before the 9" and driveshaft went in.
    Most vibrations occur around 1800 to 3k rpm
    Seems to accelerate smoothly. Like if its vibrating hard cruising at 2500 rpm and i start to accelerate it cleans up and doesnt vibrate as much.

    Its pretty much a stripped car so i expect some vibration from bare floor pans etc but its pretty obnoxious.

    Any ideas?
     
  2. Mustangnut

    Mustangnut Member

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    Also seems like now its rich at idle pretty good. Black smoke on start up and when warm idles much higher than when cold. Havent messed with the car in a while so rediscovering a lot of little issues lol.
     
  3. krelboyne

    krelboyne Remember

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    Pinion angle may be off with the new rear end.
     
  4. Mustangnut

    Mustangnut Member

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    Should i be looking for anything in particular?
     
  5. Mustangnut

    Mustangnut Member

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  6. Mustangnut

    Mustangnut Member

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    Not sure if that helps at all lol
     
  7. Mustangnut

    Mustangnut Member

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    So quick check showed 1 degree downward from tail of transmission and 2 degrees upward from rear end. Not sure if thats enough to cause the amount of vibrations im feeling. Thinking maybe something in 3rd member is wore out.
     
  8. 71gold

    71gold Frank Cooper Supporting Member

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    my thinking, 3rd member makes more noise than vibration...JMO
     
  9. Mustangnut

    Mustangnut Member

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    Yeah my thinking too but only thing that changed was rear end and driveshaft. Driveshaft was cut and balanced. I will check out third member when i pull it to put the new gears in anyways. These 4.11s are killing me cruising around. Need some 3.50s or something.
     

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