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D30 Alignment in lifted ECJ

Discussion in 'Early CJ5 and CJ6 Tech' started by grannyscj, May 21, 2013.

  1. May 21, 2013
    grannyscj

    grannyscj Headed to the Yukon

    Anchorage, AK
    Joined:
    Dec 19, 2005
    Messages:
    1,758
    Well I took Pete in to have the alignment measured today. Castor settings were +2.6* L and +2.2* R. This is with a 4* wedge sitting on 3" Black Diamond springs. So without the wedge I was at -1.4* L and -1.8* R. Looks like I'll need a 7.5* wedge to get around +6*. Way more than I expected.
     
    grannyscj, May 21, 2013
    #1
  2. May 21, 2013
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
    Joined:
    Sep 20, 2002
    Messages:
    3,437
    6° is a good target.
    On my '71 D30 swap, with 2.5" Skyjacker Softride springs, I was 0.9° and 1.1°.
    My Skyjacker springs had already been broken in; I ran them for a couple years with the D27.
    I installed 5° shims.
    It tracked perfectly after that.

    Your 3" springs probably have more arch than my 2.5" Skyjackers that were broken in when I mated them to the D30.
    And if your 3" springs are new, the arch is probably excessive, designed to settle a bit and eventually sit at ~3".
    7.5° does seem like a lot. You might get away with less if you think your springs will settle
     
    lynn, May 21, 2013
    #2
  3. May 21, 2013
    grannyscj

    grannyscj Headed to the Yukon

    Anchorage, AK
    Joined:
    Dec 19, 2005
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    1,758
    Springs are several years old, good and springy. No noticeable sag though. It does seem excessive but its only 3.5 from where I'm at now. As unstable as it is now that's probably right.
     
    grannyscj, May 21, 2013
    #3
  4. May 22, 2013
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
    Joined:
    Sep 20, 2002
    Messages:
    3,437
    In that case I'd go for the 7.5°.
    Probably have to order these custom (call McRuff) or make them yourself, 7.5° is not likely to be found on-the-shelf from the usual suppliers.
    Let us know how it works after you get them in.
    Good luck!
     
    lynn, May 22, 2013
    #4
  5. May 22, 2013
    Posimoto

    Posimoto Hopeless JEEP Addict

    Minden, Nevada
    Joined:
    Aug 7, 2003
    Messages:
    4,538
    If you want to do a lot more work and skip the shims you can cut the outer "C's" loose and rotate them. I did that with mine, mostly so I could get a better driveshaft angle. I set mine at 6*
     
    Posimoto, May 22, 2013
    #5
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