1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

another driveshaft question

Discussion in 'Intermediate CJ-5/6/7/8' started by w.welch, Mar 1, 2006.

  1. Mar 1, 2006
    w.welch

    w.welch New Member

    Joined:
    Mar 1, 2006
    Messages:
    1
    I just completed a spring over project on my 80cj. I knew there would be a driveshaft angle problem but I'm not sure if I should go ahead an buy a cv type shaft. With the dana 300, I have a 22 degree angle on the rear shaft. I'm not concerned with binding as much as possilbe vibration at highway speeds. Does anyone know the accepted max angle or is it just trial and error.
    thankshttp://www.earlycj5.com/forums/images/smilies/icon_smile.gif
    http://www.earlycj5.com/forums/images/smilies/icon_smile.gif
     
  2. Mar 1, 2006
    Posimoto

    Posimoto Hopeless JEEP Addict

    Minden, Nevada
    Joined:
    Aug 7, 2003
    Messages:
    4,538
    In the perfect world, the angle of the pinion and the angle of the Tcase output shaft are the same. I sprung for a CV and finally got rid of the vibrations.
     
  3. Mar 2, 2006
    iamgeer

    iamgeer Member

    Calgary,...
    Joined:
    Jan 30, 2004
    Messages:
    226
    I used a trial and error/educated approach. After some measuring I concluded that I needed anywhere between 6-8* shims. I started with the 6* shims first then took it for a drive and returned the 8* shims cause it fixed the problem. BTW, you should be equally concerned over dshaft binding - it only has to bind and break once to demonstrate how concerned you should be.

    Karl
     
  4. Mar 2, 2006
    Psychojeeper

    Psychojeeper Aint 'sposed to be pretty

    Las Cruces, New...
    Joined:
    Nov 15, 2005
    Messages:
    368

    When I installed 4.5 inch Rubicon Express springs I had vibration at only 20 mph,,, and that was with the kit supplied 7 degree wedges and t/c lowering kit (which is worthless) .If you go over 8 degrees or so you can kiss your diff & gears good-bye, as there will be no lube to keep them alive. You definately want to get a cv shaft,,,, small cash outlay that will save lots of headaches in the future. I'm glad I did.
     
  5. Mar 2, 2006
    jacksoncj5

    jacksoncj5 Member

    Mississippi
    Joined:
    Jan 22, 2006
    Messages:
    52
    About how much is the cv shaft and what is it exactly?
     
  6. Mar 7, 2006
    Psychojeeper

    Psychojeeper Aint 'sposed to be pretty

    Las Cruces, New...
    Joined:
    Nov 15, 2005
    Messages:
    368
    A CV joint allow for more flex (steeper angles) while the shaft is rotating. It is basically 2 u-joints in a special coupler that makes them one unit. You will also have to add a compatable yolk to the TC output.
    You can get a new one from Woods (www.4xshaft.com)or other maker, if there is a good driveline shop in your location they can add the cv to the shaft you have now.(This is what I did.Mine ran under 250$ , including the new yolk)

    Sorry I dont have pics to show you,,, I'm technologically challenged. Computers kick my butt on a regular basis.
     
  7. Mar 8, 2006
    80cj

    80cj Member

    Hawaii
    Joined:
    Sep 1, 2003
    Messages:
    554
    I seem to remember reading on Tom Woods site, I believe, that a 14 or 15 degree included angle at the u joint is about max.
     
New Posts