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Differential

Discussion in 'The Garage' started by TBlaz8, Feb 11, 2007.

  1. TBlaz8

    TBlaz8 Registered Member

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    i am buying a differential rebuild kit for my full sieze jimmy. wat is the difference between a 28 spline and a 30 spline? what should i get for my solid axel jimmy?
     
  2. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    it refers to the axle spline count. if you change it, you need new axle shafts. if you let us know what year your blazer is, we can tell you what spline shafts it should have if they are original.
     
  3. TBlaz8

    TBlaz8 Registered Member

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    i have a 1989 GMC Jimmy full sieze, stock axel.
     
  4. txfiremank5

    txfiremank5 1/2 ton status

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    That would be a 30 spline.
     
  5. goldwing2000

    goldwing2000 Guest

    Correction: That SHOULD be a 30-spline.

    My '89 had 28-spline (which I didn't realize until after I ordered the lock-rite, of course).

    '88/'89 Blazers and Burbs are the bastard children of the parts bin. All the C/K pickups got the new, gee-whizzy parts while the R/V crowd made due with leftovers.
    Only way to know for sure is to pull the cover and count them.

    Are you rebuilding the front or rear axle?
     
  6. txfiremank5

    txfiremank5 1/2 ton status

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    Good point, better to be sure, than to go on "what's supposed to be in there". ;)
     

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