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automatic hubs vs. manual

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Wallyb, Jan 29, 2001.

  1. Wallyb

    Wallyb Registered Member

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    I just bought my blazer a few weeks ago and I'm wondering if it's better to change to manual hubs and why??

    Thanks!

    P.S. This site rocks!!
     
  2. Emmettology 101

    Emmettology 101 3/4 ton status

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    I would go with the manuals for a few reasons.

    1. they are always unlocked when you unlock them
    2. Stronger
    3. Last longer

    The autos will eventually start acting up and eventually leave you stranded with a broke hub or will unlock when you most need it.

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>
     
  3. turbo

    turbo 1/2 ton status

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    Auto is never really locked in both directions.
    So down a slippery slope using low gear to slow you down the auto front hubs are unlocking.
    Warn used to make multi position auto hub that had a auto and a (true) lock position but they are no longer made.
    The auto ones start to fail and get noisey so I have replaced them on my chevy and my toyota. On the chevy the swap is simple with no extra parts needed. If only the Toyota were that simple.
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

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    'Cause the auto hubs will decide to fail you when A) you need them or B) when you need them. Mine would ALWAYS act up when I needed to climb up a slippery grade. Make a nice buzzing noise telling me that they were not engaging correctly. They would usually engage when I was spinning a tire at high rpm because I was stuck trying to 4wheel in 2wheel. If theres a better way to bust stuff than having the wheels spinning at 2000RPM, and then have the front hubs lock in, I can't think of it. BTW, I pulled them apart and cleaned and regreased them, it made absolutely no difference. There was no visible wear or broken parts, they simply did not work correctly.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://yeagerd.home.mindspring.com/index2.html>http://yeagerd.home.mindspring.com/index2.html</A>
     
  5. Sammy

    Sammy 1/2 ton status

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    Might be a question that sounds foolish but how do I take the autohubs apart?

    "K5 Grand GT in the Netherlands."
     
  6. dyeager535

    dyeager535 1 ton status Premium Member

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    You just need to unbolt them (allan heads if i remember correctly) from teh outside. Once you do that, they will mostly fall off in your hands. Can't remember if you have to remove the funky nut in there (4 slots on it, need a special socket) or if that is just for the wheel bearings. Not a horrid idea to check that adjustment while you are in there anyway. Once you get them unbolteed, whatever you decide to use instead should have instructions with it. Personally I had some factory Spicer manual hubs laying around, I swapped them in instead.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://yeagerd.home.mindspring.com/index2.html>http://yeagerd.home.mindspring.com/index2.html</A>
     
  7. DMK

    DMK 1/2 ton status

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    You will need a torx bit not sure what size. Snap ring pliers, some small screw drivers to remove large snap ring in hub.
    First remove six torx head bolts, then axle snap ring, than large snap ring, this holds the locking hub body in. pull out hub.
     

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