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Installing shims, step by step anyone?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by PetaKane, Nov 13, 2002.

  1. PetaKane

    PetaKane 1/2 ton status

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    Do you just put the axle on stands, unbolt the u-bolts and put the shims in there? Do you have to clamp the springs or anything else like that along the way? Thanks
     
  2. zakk

    zakk 1/2 ton status

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    the way i did it was:

    1. unbolt shocks
    2. take lug nuts off
    3. secure frame on stands & chalk tires
    4. take tires off
    5. let suspension go to full droop (watch brakeline, take off if necessary)
    6. secure axles
    7. take off u-bolts
    8. add shims
    9. reassemble

    This is how i did it and i am sure it was wrong. Talk to your doctor about side effects. Follow directions on box. Your results may vary.
     
  3. PetaKane

    PetaKane 1/2 ton status

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    Step 5 and 6, how do I let the suspension go to full droop? Won't it do that on it's own? And by securing axles do you mean just put jackstands under them? Thanks Zakk

    Tyler
     
  4. zakk

    zakk 1/2 ton status

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    yes...yes....and yes /forums/images/graemlins/grin.gif

    It will make a whole lot more sense as you start doing it. Just watch the rear brakeline. when i did my swap, you could plat the brakeline like a banjo /forums/images/graemlins/shocked.gif /forums/images/graemlins/laugh.gif
     
  5. Confederate9

    Confederate9 1/2 ton status

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    yea i agree,
    the shims dont have anything to do w/ the actual spring pack i believe.
    a little tip that i would do is once the frame is jacked up, then support the diff w/ a floor jack, unbolt the u-bolts then SLOWLY drop the axle w/ the floor jack. i have 4 jack stands and what i did is when i dropped the axle i dropped it onto the other 2 jack stands for safety.
    remember: theres always time for safety
    if you dont have that many floor jack try cutting some 6x6 blocks of wood to length then put the axle on that.
    thats my .02 /forums/images/graemlins/thumb.gifif its confusing let me know and ill clarify.
     
  6. PetaKane

    PetaKane 1/2 ton status

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    Okay guys, I've got the shims installed, but the axle didn't rotate with them. What the heck? My pinion angle hasn't even changed.
     
  7. Burt4x4

    Burt4x4 3/4 ton status

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    Hmmmm??? That is /forums/images/graemlins/confused.gifing??
    did you put the thicker end tward the back?
    Any pics?
    They way I do mine is first lift the whole rear up, take the tires off then set the rearend on my lil short jackstands on the lowest setting(without the drims hitting the floor). then I lift the rear of the truck by jacking under the hitch. As soon as the rearend starts to lift a little I stop jacking then loosen the Ubolts and continue jaking so now the springs lift off the rearend. I also support the pinion to keep it from dropping/twisting downward. Insert shims, drop the rear of the rig and test the angle with an angle finder.
    Good Luck /forums/images/graemlins/thumb.gif
     
  8. zakk

    zakk 1/2 ton status

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    something is wrong. it should have changed one way or the other. is thje spring bolt lined up? did it go through the pearch?
     
  9. PetaKane

    PetaKane 1/2 ton status

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    The fat end is supposed to face the rear?
     
  10. Burt4x4

    Burt4x4 3/4 ton status

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    Yup, you need to push the back of the axel downward to get the pinion to go upward! /forums/images/graemlins/thumb.gif
     

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