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Axle shims

Discussion in 'Wrangler YJ (1986-1995)' started by fvellozzi, Jan 23, 2017.

  1. Jan 23, 2017 at 4:24 PM
    #1
    fvellozzi

    fvellozzi [OP] Member

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    I just installed a set of Crown HD leaf springs in my YJ. Unfortunately the two pinion angle shims between the axle and the springs fell apart when I dropped the springs (very corroded). I managed to temporarily put the pieces back in when installed the new springs. The new springs brought the jeep back to it's correct ride height plus 1/2". A road test produced "0" vibration.I was told the factory shims could be either 2 or 4 degrees. Does anyone know for sure what is the angle of the original shims?
     
  2. Jan 23, 2017 at 7:11 PM
    #2
    C2T

    C2T Well-Known Member

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    If you are speaking of what came from the factory, I do not believe there was any. I find no reference to any in the original parts catalogs.
     
  3. Jan 24, 2017 at 5:45 AM
    #3
    OFFGRID

    OFFGRID Well-Known Member

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    Some YJs did come with Wedge shims from the factory. My 94 has them. I don't know what degree it is. If I had to guess I would say it was a 2* shim.
     
  4. Jan 24, 2017 at 12:25 PM
    #4
    C2T

    C2T Well-Known Member

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    Well, I am glad I did not too definitive a statement on them. I learned a long time ago that just because I don't know about it does not mean it does not exist. hahaha Thanks for correcting me Peter. :)

    Anyway.....I saw limited availability on 2* but 2.5* and higher shims seem to be all over the web.
     
    OFFGRID likes this.
  5. Jan 24, 2017 at 5:22 PM
    #5
    fvellozzi

    fvellozzi [OP] Member

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    Thanks for the info fellas I really appreciate it. I went down to a local spring shop yesterday and spoke to one of the techs. (It's amazing what info you can get with coffee and DD) He was aware of the shim and says that they frequently fall apart when they do springs on Jeeps. He showed me the ones he stocks which are identical to the ones I had. He's only seen them used with stock springs and said that some Jeeps come with them and some without. In his opinion, on stock set-ups, they're there to affect caster more than pinion angle. 2 degrees is the magic number. I've already ordered a set of steel one from Quadratec. By the way these guys also install both aftermarket leaf and coil spring lift systems for customers which he said usually come with the manufacturer supplied thicker (angled) shims depending on the lift.
     
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