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4x4 12 bolt vs 4x2 12 bolt

Discussion in 'The Garage' started by kgblazerfive, Mar 21, 2005.

  1. kgblazerfive

    kgblazerfive keymaster Premium Member GMOTM Winner

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    Does anybody know if the axels are interchanable, five lug verses six.
     
  2. diesel4me

    diesel4me 1 ton status Premium Member

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    I've swapped them...

    I put 6 lug axles in a 5 lug 2wd rear axle before--I'm not sure if all of them are interchangable though,so it would be wise to measure the bearing sizes,spline counts,overall length,etc, to make sure--someone else might know more specs than I do,but I wouldnt doubt if they are all the same--chevy didnt change too many things like that....:crazy:
     
  3. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    yes they interchange, the only difference on the housings is the shock tabs are lower on the 2wd vs the 4wd.
     
  4. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    Another difference is the backing plates and brakes . The older trucks had skinny brake shoes and a shallower backing plate . Later trucks have wider shoes and deeper backing plates . I reused my 83's 10 bolt brakes on my 12 bolt :k5: :k5:

    And one of my truck(s) 12 bolts IS from a 2wd with 6 lug shafts :D
     
  5. R72K5

    R72K5 Banned

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    its not the years that differed in brake widths.....


    its the heavy duty springs/chassis package or lack of such that made the difference in what brakes size was installed....


    any year, 73-up years or 80-up years

    didint matter

    was all same deal, both sizes existed alot of years 70s and 80s

    2.75" and 2" wide, both

    and it doesnt matter anyways cuz all the 70 up shafts are same length regrdless of brake size

    just the backing plates and shoes differed, easy swap form any housing to any other housing


    little known secret that i found out from trial and error, you can widen a 69 older axle by using the 70s 80s 2.75" wide backing plates, drums and shoes and 70-up shafts

    regardless of 5 or 6 lug,
    lug count doesnt matter at all either

    this swap will make a 69 older axle same width as a 70-up axle
     
  6. kgblazerfive

    kgblazerfive keymaster Premium Member GMOTM Winner

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    So if I have a 6 lug rear axel that was trused and beefed up with lots of exterior modifications and my front is five, cause its two wheel drive, I want to put five lug axels in the back, so I only need one type of spare, it would fit. The rears are from a 78 and 77. Brakes are going to be disc swap which for the five lug is going to have to be aftermarket racing stuff.
     

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