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How do you tell the difference

Discussion in 'The Garage' started by Cricket, Sep 25, 2005.

  1. Cricket

    Cricket 3/4 ton status

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    Is there a visual or figural difference between 10 bolt and 12 bolt 30 spline inner axle shafts?

    What about stubs?

    I'm trying to determine just what axle sets I have aquired. :confused:
     
  2. 85mudblazin

    85mudblazin 1/2 ton status

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    No such thing as a 12b front.........
     
  3. Cricket

    Cricket 3/4 ton status

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    Well hell, Dana 44 is what I meant. The difference between 30 spline D44 and 10 bolt axle shafts.
     
  4. 85mudblazin

    85mudblazin 1/2 ton status

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    Count the splines, I dont think D44's are 30 spline.
     
  5. txfiremank5

    txfiremank5 1/2 ton status

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    Ooops, there you go thinking again.. :p:

    D44's do have 30 splines, as far as I can recall anyway.
     
  6. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

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    Later model 10b's are 30 spline as well.
     
  7. Hossbaby50

    Hossbaby50 3/4 ton status

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    The shaft length should be different. The neckdown on the axleshaft is probably a little different too. The best way I know of though is the length of the shaft.

    Harley
     
  8. 85mudblazin

    85mudblazin 1/2 ton status

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    Dont know that much about these little axles :p:

    but I DOOO know the stubs and joints are the same :D
     
  9. 89GMCSuburban

    89GMCSuburban 1/2 ton status

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    The other way to tell? See if it fits...
    Not too hard, I can have the thing down to the stubs in 15 minutes.
     
  10. txfiremank5

    txfiremank5 1/2 ton status

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    You may try checking the diameter. I think the 10 shaft is about 1.28 .. and the d44 is over 1.3 .. maybe 1.31 or 1.32 something like that anyway. I know it's not a lot of difference, but may help. :dunno:
     
  11. txfiremank5

    txfiremank5 1/2 ton status

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    Pleeeeeezzzz

    The 10 bolt, would be what you just pulled out from under your K5.

    Wheres the :kickballs: when you need it! :wink1:



    :D
     
  12. 89GMCSuburban

    89GMCSuburban 1/2 ton status

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    That's for 28 spline---1.28". 30 spline 10 bolt and Dana 44 shafts are both 1.31". Only difference is spline cut, really.
     
  13. txfiremank5

    txfiremank5 1/2 ton status

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    COO :thumb: I was wondering about that.. wasn't sure what the 30 spline 10b diameter was. I'm lucky to remember the diameter as it is.. :rolleyes: :doah:
     
  14. Cricket

    Cricket 3/4 ton status

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    From what I can find the length for the truck axles before 1988 is 31 5/16, only problem the D44 is the same length.

    Here's a few pictures, see what you think.
     
    Last edited: Apr 15, 2006
  15. 85mudblazin

    85mudblazin 1/2 ton status

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    The seal neck down on the long inner looks to be a 10b shaft.
     
  16. 6.2Blazer

    6.2Blazer 1/2 ton status

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    I made this picture years ago and sent it to both Randy's R&P and Stephen at ORD when the big 30-spline 10-bolt debate started:

    [​IMG]

    This is a Dana 44 shortside inner laying next to a 30-spline 10-bolt shortside inner.

    As you can see the length is different as the offset of the differential is slightly different between the D44 and 10-bolt. On the longside shafts the D44 is longer than the 10-bolt. Also the seal surface area is completely off between the two types.
     
  17. Cricket

    Cricket 3/4 ton status

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    Eureka! Hey 6.2 would you happen to have the measurements for the short/long D44. At least I'd have the high and low figure.

    The D44 shaft looks like it has less of a neckdown and a more pronounced shaft seal base. I think I've got the D44 shafts.

    By the way THANKS!
     
    Last edited: Apr 15, 2006
  18. 6.2Blazer

    6.2Blazer 1/2 ton status

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    10-bolt:
    Short Length 19.15 in.
    Long Length 35.46 in.

    DANA 44
    Short Length 18.31 in.
    Long Length 36.13 in.
     
  19. Cricket

    Cricket 3/4 ton status

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    :bow: Genius - Sheer Unadulterated Genius :bow:

    Thank you!
     

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