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What is the acceptable angles for drive lines? (pic inside)

Discussion in 'The Garage' started by jjlaughner, Nov 16, 2003.

  1. jjlaughner

    jjlaughner 3/4 ton status

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    I had a few vibes after the lift and they are getting worse. When I regear I want to make sure I have the vibes cleared up. I was thinking about a slip/cv rear line and my front spacer should be here wed.

    Things I have done.
    -installed a 3* shim on the front and rear axles
    -dropped the transfercase x-member and installed a new tranny mount

    [​IMG]

    so when I measure these angles... how is the easiest way and what angles should I be looking for as a tolerence?
    I may still need to replace the zerorate/shim in the back with a 2" X* block (from az-kickin).
    So what do I need to do? /forums/images/graemlins/ears.gif
     
  2. Muddytazz

    Muddytazz 1 ton status

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    The diff yoke and TC yoke should be with 2* - 3* of each other /forums/images/graemlins/thumb.gif
     
  3. Jonny-K5

    Jonny-K5 1/2 ton status

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    looks like you've got too much angle out of the transfer case. i think the only way your gonna get no vibes is with a CV shaft.if your going to lift it more with a block, make sure you take that into account when you decide the length of the new shaft.
     
  4. R72K5

    R72K5 Banned

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    Jeremiah, maybe if you could tilt your axle back/up a little ? looks like it would help for at least right now anyways


    loks pretty good under there for a midwestern truck as old as an 87, whats under there for coating ?
     
  5. Confedneck

    Confedneck 3/4 ton status

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    why not tilt the transfer case a little? loosen the motor mounts so they dont bind, and shim the back of the tcase down maybe 1/4" and see if that helps, tighten everything back up and see what happens..
     
  6. CyberSniper

    CyberSniper 1/2 ton status Premium Member

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    I'd probably do my best to align the pinion and transfer case output so they are in parallel. I have a far worse driveline angle problem right now than you (my pinion is pointed up past the driveshaft) and I don't get a vibration until around 72mph. I'd see about replacing both universals.

    They say universals are only good for 4° but I say 12° is good as long as they're in parallel.
     
  7. jjlaughner

    jjlaughner 3/4 ton status

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    [ QUOTE ]
    Jeremiah, maybe if you could tilt your axle back/up a little ? looks like it would help for at least right now anyways


    loks pretty good under there for a midwestern truck as old as an 87, whats under there for coating ?




    [/ QUOTE ]

    I just took the flap wheel on the grinder and sanded down the frame painted it with a rust cap hammerite paint from autozone. The axles got a quick shot of black... you can tell I didn't do too much between the frame rails though /forums/images/graemlins/rotfl.gif
     

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