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Dana 44 interchangeable with GM 10 bolt?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Esteban86K5, May 25, 2001.

  1. Esteban86K5

    Esteban86K5 1/2 ton status

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    I found a guy who has the front 3/4 ton spindle,hub and rotor off of a dana 44. Can I use that on my GM 10 bolt? He seems to think that i just have to change the whole assembly and it should work. I don't know how different these axles are and if they are interchangeable. Are the axle shafts the same diameter. Do they extend out enough? The backing plates I got from Border Parts in San Diego are for my 10 Bolt. will they work with the 44's parts? The locking hubs he had were huge compared to my 10 bolts. My truck is an 86 and he said the hubs came off a 73 pickup. Am I better off just to keep looking untill I find a 3/4 ton 10 bolt? Thanks for all your help in advance.

    <font color=blue>Esteban</font color=blue>

    <font color=red>SEMPER FI TO MY BLAZER
     
  2. LittleJimmy

    LittleJimmy 1/2 ton status

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    This what I got. A 3/4 ton dana44 and 14 bolt rear end. You will not be able to use anything from the 10 bolt. The hubs are different. About the only thing you can use is the spring plates for the dana44.
     
  3. FRIZZLEFRY

    FRIZZLEFRY 1/2 ton status

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    I just swapped in an early 44 in place of my 10 bolt.I took the spindles,bearings, locking hubs,rotors,and calipers off of the 10 bolt and put them on the 44.Bolt your 10 bolt spindles to the 44 knuckle and put every thing back on just like on the 10 bolt.I dont know if they are all like this but it was almost too easy.I was putting this off because I thought it was more of a hassle.

    All work and no beer makes Frizz a dull boy
     
  4. Executioner

    Executioner 1/2 ton status

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    The key is definition ! What do you mean when you say interchangable ?
    What do you mean when you say will it work ?

    If you go by the strick definition of interchangeble( FIT&lt; FORM&lt;FUNCTION&gt;SPECIFICATION) then
    no there are not many parts from a 10 bolt to Dana(Spicer) 44, or visa a versa.

    What are you trying to do, its not to clear to me ?
     
  5. 6.2Blazer

    6.2Blazer 1/2 ton status

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    Yes, this should work. The backing plates (caliper supports), spindles, and hub/rotor assemblies are interchangeable between the 44 and 10-bolt..........with some explanation required.
    These are things I know of right off hand.

    GM used two different spindles, with one requiring a different inner wheel bearing. The spindles can bolted on to either axle, but you have to make sure the you have the correct bearings.

    The "huge" locking hub on the Dana 44 you are looking at is called an external mount hub. Your current "small" hub is an internal mount. These hub assemblies are obviously different, but one can be exchanged for the other. However, I really don't like the large external mount hubs because their design is inherently weaker.

    The backing plates should work, as long as you have the ones for either the 6-lug or 8-lug hub. The 8-lug rotor is larger in diameter, therefore the caliper support for the 8-lug is taller.

    The calipers should all interchange, though I think some older styles may have different hose fittings.
     
  6. Esteban86K5

    Esteban86K5 1/2 ton status

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    Executioner- What I'm trying to do is change my current 1/2 ton 6 lug front hub and rotor on my 10 bolt to a 3/4 ton 8 lug to match my 8 lug 14 bolt. I don't want change my whole axle out as the gears where just done a couple of years ago and I just got done putting in new balljoints and all the tie rod ends.
    Now what I found was an 8 lug hub, rotor, and spindle assembly from a 73 pickup with a dana 44. What I have heard is that the 44 had a larger axle shaft tham the 10 bolt. Will the locking hubs on the 44 hub work on my 10 bolt axle shaft? I also have the option of going with the larger hub or a set with a conversion to smaller hubs.

    6.2- Why don't you like the larger external hubs? They seemed to be beefier. Have you heard or seen the conversion to the smaller hub that I'm talking about?

    <font color=blue>Esteban</font color=blue>

    <font color=red>SEMPER FI TO MY BLAZER
     
  7. bigblue

    bigblue 1/2 ton status

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    esteban you let me know when you get that set up ! I can't wait to have 4 eight lug rims on my truck! I am searching for a D60 right now...Also I am interested in seeing how you set up your e-brakes

    [image]http://a580.g.akamai.net/7/580/2855/b930c359d37700/www.swell.com/travel/surfmaps/us/florida_south/images/hill_pumphouse_i.jpg[/image]
     
  8. Esteban86K5

    Esteban86K5 1/2 ton status

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    Hey Jeromy, I might be going to SD next Sat. If I go I'll call you and maybe we can meet somewhere.

    <font color=blue>Esteban</font color=blue>

    <font color=red>SEMPER FI TO MY BLAZER
     
  9. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Ok, everybody pay attention here:

    GM has two different types of axles: the "first design" and the "second design". For those who dont know the difference, the "first" goes from 73-76. The "second" goes from 77 to 91. Some differences are:

    1. Backing plates are ALL diffferent. Both 1/2 and 3/4 ton for both designs are NOT the same thing. 3/4 tons are larger diameter than the 1/2 tons. There are currently 6 different types of backing plates. The 1/2 ton has the 73-76, 77-80, and 81-91. 3/4 ton is the same years, but only bigger around.

    2. Bearing hub and rotors are different. There are 4 types. 73-76 use a smaller wheel bearing on both the 1/2 and 3/4 ton. The 1/2 ton bearing hub is an internal drive. 3/4 tons were available in both the internal and external drives. 77 and newer bearing hubs are the same size wheel bearing. 1/2 and 3/4 tons are all internal drives. The differences in the rotor diameter is the fact that the 3/4 tons are larger around than the 1/2 tons. This is why the backing plates are larger around than the 1/2 tons. If you use a 1/2 ton backing plate on a 3/4 ton rotor, the caliper will NOT even align up with the bolts. If the 1/2 ton rotor is used with the 3/4 ton backing plates, the caliper will NOT have enough pad contact with the rotor.

    3. Spindles. 73-76 are one type only. They are "first design" small bearings. 1/2 and 3/4 ton spindles are interchangable. 77-91 spindles are "second design" and all interchangable between 1/2 and 3/4 tons. You cannot use a first design spindle with a second design bearing hub & rotor. The hub will wobble in place. If the second design spindle is used with a first design bearing hub, the hub will not even go on at all.

    4. D44 and 10B axle shafts are not interchangable. The D44 shafts measure: right - 36.13"
    left - 18.31"
    10B shafts measure: right - 35.46"
    left - 19.15"

    5. Steering knuckles. D44's have the infamous "flat top" knuckles on the passenger side. These are good for the crossover steering for where the steering arm is mounted on top of the knuckle after machine work and drilling has been done. The 10B knuckles have NO flat surface whatsoever. Machine work would be excessive to make the crossover work and therefore would be easier and cheaper to locate the correct knuckle off a D44.

    All in all, when doing a swap like this, try to round up the parts off one truck to use on the other. Such parts to swap over would be: backing plates, spindles, bearing hub & rotors, and if desired for crossover steering, the knuckles.

    The knuckles do NOT need to be changed if you do not plan on the crossover steering.

    It all boils down to this: D44 and 10B parts ARE interchangable from the knuckles out. Anything else from the knuckles in is NOT interchangable.

    In Estebans case, he has an 86 blazer and found 73 three quarter ton parts. He would need to use the 73 backing plates, spindles, bearing hubs & rotors.

    ALL calipers on both D44 and 10B are compatible with either axle. Even the first and second design axles are compatible with BOTH 1/2 and 3/4 ton calipers. So, whatever swap you plan on doing, you can retain your stock calipers.
    When stepping up to the big D60, this is a whole different ball game. Nothing is interchangable from the D44 and 10B to the D60.

    Any questions or comments, please let me know.

    When In Doubt, Whip It Out!<P ID="edit"><FONT SIZE=-1>Edited by thatK30guy on 05/25/01 05:53 PM (server time).</FONT></P>
     
  10. Esteban86K5

    Esteban86K5 1/2 ton status

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    Thank You!!!!!

    <font color=blue>Esteban</font color=blue>

    <font color=red>SEMPER FI TO MY BLAZER
     

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