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Longer Rear Shackle or Zero-Rate???

Discussion in 'The Garage' started by Greg72, Feb 6, 2003.

  1. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    I have been noticing that the rear of my K5 sits a little low since the addition of softer rear springs....and I was wondering if a longer set of rear shackles would be a "valid" way to gain a little bit of height back there.

    I would normally put on a set of zero-rates and be done with it, but I have a spare set of rear shackles already and I can extend one of the mounting holes about 2" to gain 1" of lift.

    THE QUESTION:

    What am I going to affect, besides the pinion angle by adding a longer rear shackle? I know the pinion will be rotating UP, but I'm not sure what other adverse effects I might be creating with this "free" mod on my truck.

    BTW -> The rear setup is a 4" ORD Shackle Flip and a stock set of springs off an '89 K5.
     
  2. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> I don't think that a 2" longer shackle is going to affect much other than pinion angle, and if it does it's easy enough to yank it out and go for the 0 rate. </font color>
     
  3. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Cool.....I already started building the extensions tonight.

    I figured it's only a couple hours time to build and swap them in, so why not?


    /forums/images/graemlins/thumb.gif




    PS -&gt; You know, now that I think about it....adding a longer FRONT shackle might be a quick way to prove to myself that extra caster angle either WILL or WILL NOT calm down my "almost-death-wobble" tendencies!!! I suppose if it works, I could then get a tapered shim for the springpack.
     
  4. Blazinaire

    Blazinaire 1/2 ton status

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    Greg, I am using the ORD 4'' flip and I am using Belltech lowering shackles (about 3'' longer than stock) on my '87 /forums/images/graemlins/k5.gif. I did not gain any lift being that I run them at a gnasty angle with my 57''s /forums/images/graemlins/cool.gif, but I did notice a little bit more swaying in the rear end. Not like body roll, its like the axle is shifting from left to right (time for that panhard bar /forums/images/graemlins/tongue.gif). When fully flexed, the longer shackle gave the spring enough leverage to almost completely destroy the rubber shackle bushings /forums/images/graemlins/crazy.gif. Not enough reason for me to use a shorter shackle, just food for thought /forums/images/graemlins/wink.gif.
     
  5. m j

    m j 1/2 ton status

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    the stock shackle are much too short anyway so go for it
     

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