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rear cv driveshaft

Discussion in 'The Garage' started by lunchbox, Apr 19, 2007.

  1. lunchbox

    lunchbox 1/2 ton status

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    ok, i was was getting real bad driveshaft vibrations so i shimmed the rear end 8 degrees im still getting bad vibrations when i decelerate. is it possible to have a rear cv drive shaft made that would work with my 208? or are their strength problems? i searched it and im still not sure.:dunno: oh and i dont wana drop the t-case.
     
  2. loafer

    loafer 1/2 ton status

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  3. MNorby

    MNorby 3/4 ton status Premium Member GMOTM Winner

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    Call High Angle Driveline, they have a slip yoke CV
     
  4. lunchbox

    lunchbox 1/2 ton status

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    sick! now this would fix the vibes right? the pinion and d-shaft are strait im gettin vibes from the dshaft to t-case
     
  5. MNorby

    MNorby 3/4 ton status Premium Member GMOTM Winner

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    the key on a non CV shaft is to have both U-joints operating at the same angle. If you go CV you will need to rotate rear end so that the driveshaft is in a straight line to the pinion
     
  6. MNorby

    MNorby 3/4 ton status Premium Member GMOTM Winner

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  7. lunchbox

    lunchbox 1/2 ton status

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    i put the 8 degree shims in so the driveshaft and the pinion are allighned ,(sorry i didnt word it right)
     
  8. MNorby

    MNorby 3/4 ton status Premium Member GMOTM Winner

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    are you running a CV now then?
     
  9. loafer

    loafer 1/2 ton status

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    This is one of the reasons you are getting vibes; both u-joints need to be at the same angle.

     
  10. guz71

    guz71 1/2 ton status

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    If you have a NON cv shaft, then that is why you have vibes. On a non cv shaft, both of the u joints have to be operating at the same angle. With a cv shaft then your pinion has to be pointed straight a the t-case. If you have a lift you may need a cv shaft though. since it gets noticeably worse when you slow down, it sounds like you have some axle wrap too.
     
  11. MNorby

    MNorby 3/4 ton status Premium Member GMOTM Winner

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    If no CV needs to look like this:
    [​IMG]


    If CV needs to look like this:
    [​IMG]
     
  12. obijuan

    obijuan 1/2 ton status GMOTM Winner

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    i just did this tuesday. cleared right up, now i just have all the other noises and vibes to pinpoint! theres no driveline vibes at all anymore. mine were really bad. i got one used and had to retube it and a new weld yoke on the end, iverall it cost me $260. new they wanted $500:eek1:

    heres a good read:
    http://coloradok5.com/forums/showthread.php?t=202539
     
  13. lunchbox

    lunchbox 1/2 ton status

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    im at school right now so ill take pics and post them up when i get home, for some reason i think ive screwed up my description, so i think pictures will help, sorry
     
  14. lunchbox

    lunchbox 1/2 ton status

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    the pinion u joint is good its the t-case

    Ryan's CK5 and Motor 039.jpg

    Ryan's CK5 and Motor 038.jpg

    Ryan's CK5 and Motor 037.jpg
     
  15. loafer

    loafer 1/2 ton status

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    I think we understand your description perfectly fine; Both angles are wrong.

    To run u-joints at each end of a shaft they have to turn through the same angle. This means you need to lower your t-case and/or rotate your pinion down (smaller pinion angle shim) to match the t-case joint angle. You can't run one joint at 0-deg (your pinion) and one at some other angle w/o vibration.

    Your pinion angle is set up rigtht now the way it should be for a CV shaft.

    Check out the picture below:



    [​IMG]

    Notoce how the angles at each joint are the same? If the working angle are both the same, but exceed more than about 5-deg, you will also get vibration. If this is the case then it's time to consider a CV shaft. I would first try and match you pinion and t-case angles before spending money on the CV setup.



    ______
     
    Last edited: Apr 20, 2007
  16. Mudstud

    Mudstud 1/2 ton status

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    x2 what Loafer said.
     

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