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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » Chasing that 80+mph vibration

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    3/22/2023 6:31 PM  #101

    Quicksilver
    FYI Addict

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    From: California Central Coast
    Registered: 9/22/2013
    Posts: 234

    Re: Chasing that 80+mph vibration

    Did you ever end up taking her in for a dyno check up and find out what kind of HP she is putting out??

    Member since 2003, Mustang Steve has always been my homepage. 67 FastBack..Future engine is currently my coffee table
     

    3/22/2023 6:39 PM  #102

    Bentworker
    I FYI 24-7

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    Registered: 9/17/2017
    Posts: 437

    Re: Chasing that 80+mph vibration

    Lol @ RTM

    I do the same thing.

     

    3/22/2023 7:58 PM  #103

    HudginJ3
    Senior 24-7 FYI Addict

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    From: Cedar Hill, TX
    Registered: 4/29/2015
    Posts: 1,218

    Re: Chasing that 80+mph vibration

    I do to so I can compare notes. I had my car jacked up and the tires and brake drums of of it. I ran it up to 80 and more and while it was vibrating I crawled under it to "see" the vibration. There was nothing to see or feel in the driveshaft or differential. I didn't do it again because I was skiret to crawl under the car with it running like that. Im thinking it has to be in the trans.

    70, ragtop 351W/416 stroker Edel Performer heads w pro flow 4, Comp roller 35-421-8. T5
     

    3/23/2023 4:03 AM  #104

    50vert
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    From: QLD Australia
    Registered: 4/01/2013
    Posts: 1,356

    Re: Chasing that 80+mph vibration

    How did the gopro idea work out .... inconclusive?

    "Those telephone poles were like a picket fence"
     

    4/16/2024 8:31 PM  #105

    HudginJ3
    Senior 24-7 FYI Addict

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    From: Cedar Hill, TX
    Registered: 4/29/2015
    Posts: 1,218

    Re: Chasing that 80+mph vibration

    FOUND IT!!!   Wasn’t me.  I took the Mustang in to redo the exhaust system and he had to remove the drive shaft. The rear U joint had one cap that was nothing but powder. Glad thats over.

    70, ragtop 351W/416 stroker Edel Performer heads w pro flow 4, Comp roller 35-421-8. T5
     

    4/17/2024 5:09 AM  #106

    BTaylor
    FYI Addict

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    From: Carrabelle, FL
    Registered: 4/02/2013
    Posts: 115

    Re: Chasing that 80+mph vibration

    Do you still have the factory transmission dampener attached?
     

    68 Cougar XR7 347 stroker T5 3:80
     

    4/17/2024 8:01 AM  #107

    HudginJ3
    Senior 24-7 FYI Addict

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    From: Cedar Hill, TX
    Registered: 4/29/2015
    Posts: 1,218

    Re: Chasing that 80+mph vibration

    No, I removed the original 3 speed and installed a 94 T5 using a modified trans mount and an 85 T- bird driveshaft. I took the drive shaft in to have it balanced a they discarded the dampener that was on it and installed new u joints.

    70, ragtop 351W/416 stroker Edel Performer heads w pro flow 4, Comp roller 35-421-8. T5
     

     

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