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  1. #31
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    stevieturbo is offline
    All the more reason to have it nose down slightly.

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    Administrator Darren West's Avatar
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    Slightly ??
    In degrees please

  4. #33
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    I guess no-one watched the video then?.....sheesh.

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  6. #34
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    Quote Originally Posted by Darren West View Post
    Slightly ??
    In degrees please
    There is no generic answer given every suspension layout will be different, and the axle will move more/less depending on that layout and vehicle etc etc

  7. #35
    Administrator Darren West's Avatar
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    Quote Originally Posted by german8rcoupe View Post
    I guess no-one watched the video then?.....sheesh.
    i did which is why i think my set up is correct the way it is ?

  8. #36
    Exceeded sell by date Plumpcars's Avatar
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    Two answers are valid surely. One for competition, one for street. On the street if the tailshaft angles down 3deg then the diff nose would normally be set angled up 3deg. Gives you a smooth drivetrain at cruising throttle. For competition you would set nose down to allow for diff climb under full throttle. That way you minimise any power loss when racing, cruise vibration doesn't matter. In the real world I had a car where the pinion nose was angled down 2 deg and trans was down 3 deg. Had a small but annoying harshness between 65mph and 80mph. Set the diff nose to 3 deg up and the car smoothed completely out and was, and still is, a pleasure to cruise at speed.

  9. #37
    Exceeded sell by date Plumpcars's Avatar
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    For competition getting the angle right would depend upon type of axle location and amount of possible diff nose movement.

  10. #38
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    Quote Originally Posted by Darren West View Post
    yes yes yes and yes

    its a new shaft balanced
    only slip going is in the box as std
    Do you know for sure if the support bush in the tailhousing of the gearbox is A. the right size to support the prop. or B is not shot to bits or C even in there ?

    Bob
    I onlay edet to korrect bad smeeling mistaces

  11. #39
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    Pinion climb is momentary not constant. A race car will have solid mounts and that action will be transferred into traction/leverage etc..

    A rubber mounted street car will see that climb on pull away but then it settles.

    Darren, your drawing is still confusing but if the diff nose is up the same amount as the tail shaft is down then you are ok.

  12. #40
    Administrator Darren West's Avatar
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    Yeah the pinion shaft points up and the gearbox points down.

    So where do I go for this vibration issue

    The gearbox was fully rebuilt and so was the axle and the prop is new.

    Thank you very much for your help mate.

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