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How To Tell If It's A Posi? Ratchet Locker????

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by uglytruk, May 14, 2005.

  1. uglytruk

    uglytruk 1/2 ton status

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    I'VE RECENTLY COME ACCROSS several 3/4 and 1 ton axles. Some 2wd, some 4x4. Sometimes one can tell if it's a posi by checking the glove box sticker for G80. Or spin one wheel, if it's got a clutch type unit. But what about the centrifugal style. How do I tell w/o opening 'er up? :confused: :confused:
     
  2. k5freak44

    k5freak44 1/2 ton status

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    opening them up is the easyest but im sure there is a way to test it by rolling it.

    i dunno
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    If you mean the gov-lock, which is pretty much universal for a G80 truck app, if both wheels will turn freely, both off the ground, spinning one tire as fast as possible by hand, will USUALLY get a gov-lock unit to lock up.

    I don't mean get it moving slowly and speed up, I mean from no rotation to fast rotation as fast as you can jerk the wheel into motion. It should "bang" into lock and rotate both wheels the same direction.
     
  4. uglytruk

    uglytruk 1/2 ton status

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    Pretty much what I thought. These are usually sitting in a local junkyard. Sometimes dropped in the mud, and wheels jammed, so spinning them is only a dream.
    Just made an offer on another K20. Glove box sticker indicates "standard differential" or something like that. No gear ratio indicated. My '86 'Burb says "G80 3.73 ". Very informative. 3/4's are usually 4.10-4.56. And some kid just offered to trade me 3/4's for my still on vehicle 1/2 ton axles from his '87 'Burb. Interesting. Andrew :laugh:
     

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