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why wont the front axle engage?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by sinchphoto, May 24, 2002.

  1. sinchphoto

    sinchphoto 1/2 ton status

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    10 bolt front with auburn and manual hubs.
    when i punch the gas the front axle only spins for a second or two and then NO MORE.
    the transfercase is still spinning the front driveshaft but the front tires wont spin. we put the truck on a pile of sand with the tires on top of it and thats how i was able to see all this.
    Bad hubs? not engaging right? any thoughts guys?
     
  2. cegusman

    cegusman 3/4 ton status

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    Sounds like bad hubs if driveshaft is still spining.
     
  3. txbartman

    txbartman 1/2 ton status

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    Sounds like the hubs aren't engaging properly.
     
  4. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Uhhhh With a auburn it should at some point engage both axles. One bad hub I could buy but two bad hubs sounds weird unless assembled wrong or cheap ones. I'm leaning towards a blown auburn or a stripped ring and Pinion on this one.
     
  5. Blue85

    Blue85 Troll Premium Member

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    Look inside the knuckles to see if the axle U-joints are spinning. If so, it has to be the hubs. If not, look for a broken Auburn or teeth missing from the ring and pinion.

    Also, are you sure that all of the parts are correct and that they are assembled correctly? If you use the wrong axleshafts, for instance, or have the hubs installed incorrectly, you could get a problem like this.
     
  6. 70~K5

    70~K5 1/2 ton status

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    Isn't the auburn a posi? With a posi don't you need some engagement from one side for power to transfer to the other side? If one hub is bad then will power still transfer to the other side? Not sure but???
     
  7. Z3PR

    Z3PR Banned

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    I'd say pull the cover and look if you can see anything broken. Jack it up (tires off ground) have someone spin drive shaft while you see if knuckels are rotating. Good luck, hope you get it fixed soon with out having to spend too much on parts.
     
  8. tagurit

    tagurit Registered Member

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    I hate to seem dumb, but where/ what are the knuckles you speak of?
     
  9. Silver84k5

    Silver84k5 1/2 ton status

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    Knuckles are the part that Pivots on the main axle tube, on the outer most part of the Main axle housing it kinda comes to a "C" the knuckle is conected to the Top and Bottom part of the End of the Axle house "C", let me know if i explained it so you can understand,
     
  10. tagurit

    tagurit Registered Member

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    then the knuckles are on the outside of the axle tube near the inside of the brake drum?

    I'm not too "in the know" when it comes to the underside of the truck.
     
  11. Silver84k5

    Silver84k5 1/2 ton status

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    drum? your talking about the front end right?> should be a disc
     
  12. Z3PR

    Z3PR Banned

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    Yes. But you should have disc breaks on your truck.
     
  13. tagurit

    tagurit Registered Member

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    yes, I do have disc brakes on front, haha... I just didn't know what to call the backplate of disc brake system.
     
  14. Z3PR

    Z3PR Banned

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    Automadic locking hubs, anyone have any idea why it's not engageing ????? I don't know muck about the auto locking hubs.
     

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