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Front driveshafts?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Chris Demartini, May 13, 2001.

  1. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>I was driving to the shop today to change my trans and I had the floorhump out. I noticed that my front driveshaft is bent, will a 73-91 shaft fit? They are a little thicker and easier to find. I have an SM465 (this time with 4th and reverse [​IMG] [​IMG]) and an NP205, so if I find a shaft from a truck with the same setup it should work, right? </font color=blue>

    [​IMG]
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Some are flange outputs (like mine) and some are yoke front outputs...I found this out after buying a perfect front driveshaft from Elkboy. I'll have to do some creative swapping at the double cardan joint to make it work.

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     
  3. TX Mudder

    TX Mudder 1/2 ton status

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    Trusty, I had the same problem - bought a flange driveshaft and needed a Spicer (yoke) driveshaft. I tried the creative swapping thing, did NOT work no matter how much you want it to.
    I sprung for the shop to weld on a NEW spicer CV.
    -- Mike
     
  4. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Oh well, I might as well clean it up and use it as a paperweight then...[​IMG]

    Rene...apparently still needing a front driveshaft


    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     
  5. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>The case that was behind my new trans is a flange type, but I re-used the 71 NP205 which is a yoke style. What years came with the yoke style? Will it be the right length? Help! Memorial day is coming and my truck has been collecting dust since.... since...... a long time ago!</font color=blue>

    [​IMG]
     
  6. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    Seems like I remember hearing something about the flange type being stronger/better/desirable for some reason but I don't remember why? Anyone?

    Bad Dog

    85 K30 CUCV, 350 TBI, TH400, NP205, D60/C14, 4.56 Locked
    Soon: 4" lift, 40" tires, massive cutting, shorter wb and rear overhang.
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I heard that too but wasn't given any specific reason...I'd be curious to know as well.

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     
  8. TX Mudder

    TX Mudder 1/2 ton status

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    GM started using the flange output front on the NP205 in 1977. All 205's before are Spicer (yoke) style.
    The flange output is prefered by many because it is MUCH easier to get to the bolts that hold the driveshaft on. It is not fun on a Spicer style to turn the 7/16th wrnech 1/8th of a turn at a time - take 20 minutes to get all four bolts on or off and that's AFTER you've done it before and got fast at it.
    I have heard that the flange type 1310 CV flexes slightly better than the Spicer 1310 yoke, but I do not know this from personal experience.
    I know a lot fo this because my buddy has a 77k10 and I HAD a 76 k10.
    --Mike
     
  9. bablazer73

    bablazer73 1/2 ton status

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    the later style with the flange are MUCH easier to remove. The little bolts on the spicer type are facing the t-case and are hidden by the crossmember.

    your right. I don't understand the jeep thing!
     
  10. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    Cool, thanks for the info. Do the flange and yoke interchange?

    Bad Dog

    85 K30 CUCV, 350 TBI, TH400, NP205, D60/C14, 4.56 Locked
    Soon: 4" lift, 40" tires, massive cutting, shorter wb and rear overhang.
     

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