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Diff. Swap Full Time 4X4

Discussion in 'The Garage' started by sta500666, Apr 3, 2007.

  1. sta500666

    sta500666 1/2 ton status

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    I have an '86 K5 and I just blew out the spider gears in the rear 10-bolt for the second time... My buddy has two trucks I can use to upgrade to 8 lug, I forget the years but one has the semi-float corporate 14 and the other is full time 4X4 with a full float corporate 14. I plan on switching both the front and rear differentials.

    So my question is if I deside to go with the heavier differentials from the Full Time 4X4 truck seeing as my blazer doesn't have a Full time 4X4 transfercase, what Problems am I going to run into??? Will I even beable to use the front differential, or will I have to change the hubs to mannual lock or something?
     
  2. MattK

    MattK 1/2 ton status

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    That's the only issue I can think of, the hubs. The fulltime front axle is going to have drive flanges in it. If it's a 10 bolt or d44, a brand new set of hubs are only like $100 last I checked. You can probably get a used set for next to nothing if you poke around on the boards.

    Be aware of the differences in ujoints as well. The rear will for sure need a conversion joint(1350-s44 i believe) and the front might need one as well. If it's from a fulltime truck the axle probably has a yoke for a 1310 joint. Your stock front might also be the s44 size.

    Hope that helps.
     
  3. 1977k5

    1977k5 3/4 ton status Vendor

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    You don't have to replace the drive flanges if you don't want to. They work just fine, it's just like leaving the hubs locked in all the time.
     
  4. sta500666

    sta500666 1/2 ton status

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    Thanks! I knew about the conversion joint.
     
  5. divorced

    divorced 3/4 ton status

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    I'm thinkin that you can use your current lockouts in your new axle.
     
  6. sta500666

    sta500666 1/2 ton status

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    I have factory autolocking hubs, I might just switch to mannual.
     
  7. divorced

    divorced 3/4 ton status

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    I would. The auto hubs seem to never work when you need them to :haha:
     

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