12 BOLT REAR END

Discussion in 'OffRoad Design' started by chevyfan77, Jan 12, 2021.

  1. chevyfan77

    chevyfan77 work work work Premium Member

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    I have a 77 K5 blazer and for now (and for awhile) I will keep the stock 12 bolt rear end in the truck. My question is, did any blazers come with the 28 spline rear end or did they all come with the 30 since it is a truck?
     
  2. Wes Harden

    Wes Harden 1/2 ton status Premium Member

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    I would think since 6 lug axles they would all be 30 spline and the 5 lug car axles are 28. May be different for 1st gen.
     
  3. 1977k5

    1977k5 1 ton status Vendor GMOTM Winner

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    Your Blazer has a 30 spline rear end
     
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