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front corp. 10 bolt 8 lug conversion

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by FastEddy, Mar 6, 2001.

  1. FastEddy

    FastEddy 1/2 ton status

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    what parts would I need off of a 1985 3/4 ton front diff to convert my 6 lug to 8 lug? I have gears to match the rear 14 bolt already, would just like to convert the front to match the rear...the six lug truck is an 86 with the 10 bolt also....thanks...ED
     
  2. Emmettology 101

    Emmettology 101 3/4 ton status

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    You need to take the following off the 3/4 ton:

    Backing plates
    Rotors
    Calipers

    The rest is the same, but if you can get from the knuckle out for the same price i would get it all to have spare parts.


    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. thatK30guy

    thatK30guy 1 ton status Premium Member

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    He should be able to reuse the calipers on the six lugs. Most of these are same part no.s from 1/2 to 3/4 tons. This would save time from bleeding the lines again.
     
  4. Emmettology 101

    Emmettology 101 3/4 ton status

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    OOooooo, 10-4!!!! Come Awn! :)

    I never check the calipers. I did the opposite swap some I wasn't sure on the caliper issue.

    Thanks.

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>
     
  5. KrebsATM02

    KrebsATM02 1/2 ton status

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    Yup the calipers are the same, but you need the hub assembly too, if you are buying the rotors seperate.

    Doug Krebs
     
  6. KrebsATM02

    KrebsATM02 1/2 ton status

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    Yup the calipers are the same, but you need the hub assembly too, if you are buying the rotors seperate.

    Doug Krebs
     
  7. Emmettology 101

    Emmettology 101 3/4 ton status

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    The hub is the same for the 6 or 8 luggers.

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

    Waxer 1/2 ton status Author

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    You'll need the spindles, new bearings (cheap insurance), the hub/rotor assemblies, the backing plates/caliper supports, the locking nuts & washer, new seals would be a good idea as well. I just finished this swap and am almost finished with the write up on it. Will be submitting it to Steve for ck5.com. Plenty of pics included.
     
  9. Emmettology 101

    Emmettology 101 3/4 ton status

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    But all he really needs is the backing plates and rotor/hub(two pieces together) to make it an 8 lugger. The rest of his 6 lug parts will work.


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

    Waxer 1/2 ton status Author

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    No he doesnt, the spindles on the 3/4 ton are thicker and wont work with the 1/2 ton components. The bearings on the 3/4 ton are larger. Have you done this conversion? I have and trust me he needs the spindles out.
     
  11. Emmettology 101

    Emmettology 101 3/4 ton status

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    Yes, I have done this conversion. I converted an 8 lug 44 to a 6 lug using 10 bolt parts and I also used the spindles from the 44 on another 6 lug 10 bolt.

    If you remember you wanted to buy my 8 lug stuff a while back, But I had already gotten rid of 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>
     
  12. Waxer

    Waxer 1/2 ton status Author

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    Yah I remember.

    When I did the conversion which was a week or so ago, I put the 3/4 ton spindle next to the 1/2 spindle and they are different. The 3/4 ton is larger. The bearings are larger as well. I have the pics to prove it. Anyways, no need for us to argue. We both are trying to help the guy and eachother. I'll gladly share my info with yours.
     
  13. Emmettology 101

    Emmettology 101 3/4 ton status

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    I hope I did not come off as arguing, i was just staing my experience.

    Hmm, that is weird. When I did my conversion I compared all the parts. I compared the spindles(what the bearing sat on) and they were equal. I think I eneded up using one of the 44 and one 10 bolt spindle due to one having a little marking on it. When we built my Bros 10 bolt front, he did not have all the pieces so he used my spares and some were the 44 parts.

    Maybe my 44 was an oddball or right at a canging year or something. Come to think of it, the hubs were the older style that were large and mostly external, but used the larger wheel joints. Which I thought the large hub models were the older style and had the smaller wheel joints...


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

    Waxer 1/2 ton status Author

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    Yah when I bought the parts the guy asked me which year D44 I had. He said they made a change and said the hubs were the difference. I'm not sure on what change but I think you have the changed axle or I do.
     
  15. Emmettology 101

    Emmettology 101 3/4 ton status

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    10-4...... Anyone know how to check the year front axle stampings?



    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>
     
  16. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Ok, Waxer and Emmetology101, pay attention here: GM used two different types of spindles. They went by the "first design" and the "second design". The first design was for spindles, hub and rotors, and backing plates up to 76. In 77, they changed the spindles and the bearing hub over to what they call the "second design". You two have got this mixed up so dont go bitching at one another. If you have an 89 K5 and need rotors from a 75 K20, then yes you would need to change the spindles. But if that same 89 found rotors from a 77 K20, then the spindles would not be required for a change. Keep in mind the "first" and "second" designs on the Chevy 4x4's. Now kiss and make up. All is forgiven!
     
  17. BIGJ

    BIGJ 1/2 ton status Author

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    That makes complete sense, cause I too just did this same swap on my 87 blazer 10 bolt. The donor 8 lug stuff came off of a 79 3/4 ton. One of my 1/2 ton spindles was trash so I used one of the 3/4 tons. The spindles were EXACTLY the same.

    BIGJ
     

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