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I need a front driveshaft measurement

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by Yukon Jack, Mar 10, 2006.

  1. Yukon Jack

    Yukon Jack 1/2 ton status

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    I would appreciate it if someone could measure a front driveshaft length on a 70-72 truck or Blazer with a V8, 4 speed manual and NP205. Can either be a stock vehicle or one with a 4" lift. Middle of cv joint closest to driveshaft to middle of other u-joint would be great.

    Thanks :saweet:
     
  2. sweetk30

    sweetk30 professional hooker Premium Member

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    i dont have the mesurment but my dads old 70 3/4 ton 4x4 with 4 speed and 205 didnt have a cv shaft in the front. it was just stright up joints.
     
  3. Burt4x4

    Burt4x4 3/4 ton status

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    If I can remember I will mesure tonight:D
     
  4. Yukon Jack

    Yukon Jack 1/2 ton status

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    Thanks Burt! I appreciate it and so does my K5 :D
     
  5. Burt4x4

    Burt4x4 3/4 ton status

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    I will try to remember...:rolleyes: :D
     
  6. Burt4x4

    Burt4x4 3/4 ton status

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    Well a few beers later and my wife's friend stops by so I zoom out to the man space to take a measurement :D
    [​IMG]
    The beer in me grabed the camera to make things visual:D
    So there it is 26" to the center of the cv casting to the center of the front U-joint cap.
    4" Rancho springs sittin on 35" SSRs
    Hope this helps
     
  7. Yukon Jack

    Yukon Jack 1/2 ton status

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    Thanks, that will help me, the one I have fully collapsed is 24" and when I compared it to the one on my 69 with a 465/T221, it was too long. So I guess this means the overall length of the 465/NP205 is different. Now I need to recheck the fully extended lenght, I think it was like 26 1/2. May actually have to have it lengthened.

    Thanks again Burt, and thanks for the pic :bow:
     
  8. Burt4x4

    Burt4x4 3/4 ton status

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    Ya I had to get a longer one too. When I bought my truck it was using the stock shaft..WAY over extended...So I had a longer one made..I bent that one so the one you see is from HighAngle here in Cali.
     
  9. Yukon Jack

    Yukon Jack 1/2 ton status

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    Just for a clarification, your measurement is from the u-joint at the back of the shaft to the middle of the cv joint itself as shown on the below photo "B" right?

    [​IMG]

    If that is the way you measured it, my existing driveshaft just might be correct. I measured like in "A" from middle of u-joint to middle of the first cv u-joint.
     
  10. Burt4x4

    Burt4x4 3/4 ton status

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    Well my work's firewall is blocking that pic from were ever you are hosting it.

    Yes from the center of the cap to the center of the CV Joint (were the housing is solid and is perfectly round like this O)
    [​IMG]
    See the round casting that is just to the left of the tranny mount...the center of that.
     
  11. Yukon Jack

    Yukon Jack 1/2 ton status

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    Sweet, my driveshaft should be fine then.

    My problem is when I bought my 70 K5 it was missing it's Dana 20 transfer case and I am swapping in an NP205. It was also missing it's front driveshaft but I got another one that needed rebuilding. By the time I got the driveshaft I had the NP205 installed but the front axle out. I took the driveshaft in for a rebuild quite some time ago and they found it was not rebuildable so they just made a new one - they didn't call me first. Had they called me I might have been smart enough to tell them to hold out til I get exact measurements.

    But, sounds like this one is going to be perfect. I owe ya a beer :waytogo:
     
  12. Burt4x4

    Burt4x4 3/4 ton status

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    Cool, next time I am in KS I'll take you up on that beer:D
    Hey I know bring yourself to BlazerBash in MOAB this comming Oct ;)
     
  13. sweetk30

    sweetk30 professional hooker Premium Member

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    glad you got it figured out. as to the new shaft. if its wrong length i would tell them you didnt autherize the new shaft before. and its the wrong length for what you need. and if the other was wrong i would have had them retube it . thay might feel sorry and help you out if thay are nice. :rolleyes:
     
  14. Yukon Jack

    Yukon Jack 1/2 ton status

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    I think they probably would too but a bad thing is they made the shaft for me about 2 years ago when I was trying to get the K5 going and then it got put on hold. The good thing is it is pretty simple fix so either way it wouldn't cost them or me much to have the problem corrected.
     

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