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72 Dana 44 axles vs 73 up

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by Rusty68, Jan 24, 2003.

  1. Rusty68

    Rusty68 1/2 ton status

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    What are the differences between the 72 down disc front end and the 73 up? I noticed that the hubs are bolt on rather then the inner mounted style. Someone told me the 72 down have weaker shafts. So what is the deal? I have a 71 and a 76 front to choose from. Inform me all wise chevy gods....
     
  2. 69K5

    69K5 1/2 ton status

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    if the hubs are the bolt on iam assuming 3/8 bolts and they are spicers. these are not made any more and cant be fixed. something to think about. they do have weaker u joints on the earlier. if you plan on crossover sterring you need the flat top knuckles (71). but i think it all can swap between the 2 axels, might have to change bearings for the better shafts. this is IIRC though. do a search triaged has explained this many times. several to me.

    nathan
     
  3. IGOR

    IGOR 1/2 ton status Premium Member

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    These will be the same axles -

    In 77 it split to heavier Dana 44s - didn't I give you the Dana 44 conversion link the other day? /forums/images/graemlins/confused.gif /forums/images/graemlins/grin.gif

    I'm looking for the bearing hubs for a 73-76 3/4 ton front axle if you want to make some $$
     
  4. 70~K5

    70~K5 1/2 ton status

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    '72 down has the smaller ujoints. If they haven't been changed allready. The big bolt on hubs on the 3/4 tons cross over to ford hubs too. Check the '76 to see if the right side is a flat top knuckle too.
     
  5. Rusty68

    Rusty68 1/2 ton status

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    Ok, here is what I have been faced with. I know a guy that will trade me my 76 Dana 3/4 ton front for a complete 71 front axle and rear 12 bolt. I had asked about the 44 to 10 bolt parts interchange, but I did not see any info in there about the early style fronts. Maybe I need to re-read it. so I will for go the questions I now have until that time. Besides you gotta cut me some slack. I am new:)
     
  6. Rusty68

    Rusty68 1/2 ton status

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    Ok, so from my search I gathered that the later style axle shafts will slide in place of the early style enabling you to ditch the weaker/smaller ujoints. And since that is possible, then you no doubt could use a later internal hub in the event you blow one of the unreplaceable external type. I think I just melted my brain.....
     
  7. TONYP

    TONYP 1/2 ton status

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    good work...keep looking as I have the same problem /forums/images/graemlins/k5.gif
     
  8. 70~K5

    70~K5 1/2 ton status

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    Theres plenty of the early style hubs out there. You just have to look at jeep/ ford/ dodge trucks to find them. The other companys kept running external style hubs after chevy switched to internal hubs.
     
  9. chulisohombre

    chulisohombre 1/2 ton status

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    if youi replace the outer locking hub assembly with internal hubs you should be alright.all dana 44 shafts are interchaneable.the pre73 were weaker and a cheap upgrade is to change to post 73 shafts and ujoints.in my opinion the warn hubs run the best and i think they hae some kind of warantee.ive gotten a couple of parts for free from them.
     
  10. Rusty68

    Rusty68 1/2 ton status

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    I picked up a D44 today with all good parts except the pinion bearing is shot. So I will use it for my outer swap. It even has warn hubs! A bonus for $35.00
     
  11. chulisohombre

    chulisohombre 1/2 ton status

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    the hubs locks alone are 80 bucks so you got a great deal.
     
  12. IGOR

    IGOR 1/2 ton status Premium Member

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    Sweet - that's an awesome find!
     

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