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10 bolt axle shaft in 12 bolt???

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Pure Insanity, Jul 9, 2001.

  1. Pure Insanity

    Pure Insanity 1/2 ton status

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    I have an opportunity to get my hands on a 12 bolt out of a 70's model 1/2 ton 2 w.d. pickup, what I'm wondering is will the shafts in my 10 bolt work in the 12. I'm just buying time trying to avoid the expense of putting in the 14 ff that I have for the blazer, and hopefully not blow out a rear too kwik. As I said I'm only buying time till I have the money to get the gears for the 14 8 lug rims and at least 8 lug hubs for the front.( 60 is preferred but too pricey right now ) So will it work?? [​IMG]

    PUREINSANITY If ya can't stop,Smile as you go under![​IMG]I no longer have a photo album. thanx ZING![​IMG]
     
  2. Executioner

    Executioner 1/2 ton status

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  3. 90K5

    90K5 1/2 ton status

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    If your 10 bolt is 30 spline, they may work, because 12 botls are 30 spline too. I think i've heard of doing this before.......

    90K5

    See my truck at <A target="_blank" HREF=http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502>http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502</A>
     
  4. Pure Insanity

    Pure Insanity 1/2 ton status

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    OK well heres the deal, before i bought my truck it had a 12 in it out of a van supposedly, and the person who put it in claimed he put the shafts out of the blazer into it. Well I didn't get the 12 w/ it I got a 10 out of a 80 somethin p/u. I thot the shafts were 28 spline vs. 30 spline, which is why I'm asking. I guess I'll have to pull a shaft to find out huh? But are the shafts wide enuff is yet another question. I'd just like to know before I go thru the trouble of getting it and havin to tear down 2 axles, just to find out it wont work.

    PUREINSANITY If ya can't stop,Smile as you go under![​IMG]I no longer have a photo album. thanx ZING![​IMG]
     
  5. Blazer1970

    Blazer1970 1/2 ton status

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    12 bolts have 30 spline axles, and the axles are somewhat interchangeable with a 30 spline 10 bolt ('89 and up). I used a 12 bolt axle in my 30 spline 10 bolt in my Suburban, and all you have to do is grind a little off the end of the axle shaft before you can get the cross pin back in. If you went the other way and used a 30 spline 10 bolt axle in a 12 bolt, I think the axle would have a severe amount of end play.

    Tim

    70 Blazer CST 4X4 350 SM465 NP205
    87 Burb 4X4 350
    01 GMC 2500HD 4X4 Duramax/Allison
     
  6. ftn96

    ftn96 1/2 ton status

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    Ok, while we are on the subject then, So from what you all are saying I am assumming that I can get a 2wd 12 bolt and then purchase some 12bolt 6 lug axles to make it 4wd.
    So then my next question is about the carrier size that come with most 2wd 12 bolts. I would think the series carrier wouldn't be large enough for a 4.10 gear. Comments???

    Also, if I was to get a locker for the 12 bolt, does the Detroit C-locker replace the carrier anyway? So thus I wouldn't have to worry about the carrier size. Am I way off base here or what. I know you all will say dont wast your time on the 12. But I dont want to loose the ground clearance with the 14, I'll never be going larger than 35's on THIS truck.
    Thanks in advance

    When in doubt.....Use the Saws-all[​IMG]
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  7. laketex

    laketex 3/4 ton status

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    ok...so 10B axleshaft in a D44?

    Sherman, Tx
    <font color=red>Come Awn yall...Let's go to LUCHENBACH, TEXAS!!!
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  8. Emmettology 101

    Emmettology 101 3/4 ton status

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    A 2wd Truck 12 bolt would use the same carrier as the 4wd...

    And yes, if you buy a Detroit, you will be replacing the entire carrier anyhow... :)

    <font color=green>MIKE</font color=green> - "Hukd on fawnics,werkd fer me!"
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  9. ftn96

    ftn96 1/2 ton status

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    Emmett, Im still thinking about your 12 bolt, if its sitll available. But cant do it right now. But I did find a 2wd 12bolt in a yard here for 100. We'll see. Wheres the freaking money tree?[​IMG]

    When in doubt.....Use the Saws-all[​IMG]
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  10. Emmettology 101

    Emmettology 101 3/4 ton status

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    Ya, depending on when ya want it... Although I dont make trips to Columbus anymore. The little woman and I parted ways...

    When I was lookin for a carrier for my 4.10's, that is what I paid for a whole axle to get the carrier.

    <font color=green>MIKE</font color=green> - "Hukd on fawnics,werkd fer me!"
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  11. Executioner

    Executioner 1/2 ton status

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  12. 6.2Blazer

    6.2Blazer 1/2 ton status

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    Yes and no.......
    The 10-bolt rears started using 30-spline shafts around either '88 or '89. As already mentioned, I believe the 10-bolt 30-spline shafts are just slightly longer at the carrier end to give them the right end play (presumably because the 12-bolt center pin is larger??)..........though it might actually be the other way around, though I'm pretty sure there is a slight difference.

    Also, I believe the only difference between a 2wd and 4wd 12-bolt is that the 2wd has a 5 lug bolt pattern while the 4wd has the 6-lug pattern. I would think you would be able to find a set of 6-lug 12-bolt shafts around for relatively cheap.

    In regards to another reply, no the Dana 44 and 10 bolt shafts will not interchange. In front axles, there is a length difference between the inner axle shafts and the pressure angle of the splines is different. Also, most front 10-bolts were 28 spline (with only the '89-'91 front 10B being 30-spline) while all Dana 44's (except for some real early models) were 30 spline. However, the outer stub shafts are all the same assuming they are made for the 297-x size joint (some early 44's had the 260x joint).
     
  13. ftn96

    ftn96 1/2 ton status

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    Ok, so I can pick up the 2wd rear for 100 bones, then get a detroit C-locker for a 4.10 size R&P, then get me some Moser moly axles with six lugs and I should be good to go?

    When in doubt.....Use the Saws-all[​IMG]
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  14. Emmettology 101

    Emmettology 101 3/4 ton status

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    10-4. While you're at it, look into getting a fullsize van 12 bolt and then get the axles made for it, this will match your rear axle width with the front.

    <font color=green>MIKE</font color=green> - "Hukd on fawnics,werkd fer me!"
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  15. ftn96

    ftn96 1/2 ton status

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    What years vans would I need to be looking for to get the van 12 bolt?

    When in doubt.....Use the Saws-all[​IMG]
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  16. Pure Insanity

    Pure Insanity 1/2 ton status

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    OK so basicly its a no for swapping the axles. Thanx for the input I guess I'll pass on it. I was just hopin to put in somethin a little stronger and keep my 6 lug wheels for now. Guess I'll just wait.

    thanx again

    PUREINSANITY If ya can't stop,Smile as you go under![​IMG]I no longer have a photo album. thanx ZING![​IMG]
     
  17. keith

    keith 1/2 ton status

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    Side note/ The 28 spline carriers are stronger than the 30 spline carriers in the 10 bolts. The casting around the sides where the axle enters is thicker on the 28. GM just machined that carrier out to fit a 30 spline thus making that part of the carrier thinner and weaker. The rear end guy said he has never seen a 28 spline carrier broken but can't count how many 30 carriers he has seen broken.

    79 Blazer 6"lift 38 SX's locked/4:56 <A target="_blank" HREF=http://www.keith.rockcrawler.com>http://www.keith.rockcrawler.com</A>
     
  18. 6.2Blazer

    6.2Blazer 1/2 ton status

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    Yes, when it comes to factory carriers the 28-spline version is stronger. However, when it comes to aftermarket carriers (i.e. Detroit Locker, etc..) I don't think you would have to worry about it, and the added strength of the 30-spline shafts would be nice.
     
  19. 84_Chevy_K10

    84_Chevy_K10 Banned

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    If you've got $50, I have a pair of 12 bolt axles. The slight problem might be getting them out of the housing as I can't turn the carrier to get out the cross shaft. If you're interested, email me or PM me on here and I'll hook you up.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     

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