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Thread: Pinion angle

  1. #1
    Jeep Owner
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    Lightbulb Pinion angle

    Hi guys So recently ive replaced all my suspension with a metalcloak 3.5 inch lift, Ford 8.8 rear end, Teraflex extreme short sye, and adams offroad driveshaft. I am getting a mild to medium vibration between 30-40 MPH and am just wondering if that is still from my pinion angle. I set the lower control arms longer to correct the angle a bit but am wondering if i shorten the uppers will it fix the vibrations.IMG_1174.jpgIMG_1173.jpg

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  3. #2
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    This was my original angle before messing with my lower control arms IMG_1176.jpgIMG_1175.jpg

  4. #3
    Moderator Pthorpe84's Avatar
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    Do you notice it more when you speed up or slow down?


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  5. #4
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    You need to shorten your top links. The best way to get this angle correct is to use a cheap angle gauge. They are less than 10 bucks and even a few bucks at harbor freight.

    Remember, when you put items in your jeep, the back suspension drops, so always account slightly for that.

  6. #5
    Jeep Owner
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    IMG_1179[1].jpg isIMG_1179[1].jpg this the correct way

  7. #6
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    Quote Originally Posted by Pthorpe84 View Post
    Do you notice it more when you speed up or slow down?


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    Speed up

  8. #7
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    YES! That dial gauge. BUT, you need to put it on a piece of the axle housing that is horizontal to the pinion shaft. Then attach it to the driveshaft. We like to set ours a few degrees low on the pinion angle to account for acceleration and people in the vehicle. Yours is currently set pinion high, so when you speed up or when you have people in the Jeep the pinion angle gets worse.


    Quote Originally Posted by Tyjedre16 View Post
    Speed up
    makes total sense since you are currently set up as pinion high. Bring the pinion shaft down.

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  10. #8
    Moderator Pthorpe84's Avatar
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    Gospel


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