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NP205 Adaptor Question?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by DukeBoy88, Jan 22, 2003.

  1. DukeBoy88

    DukeBoy88 1/2 ton status

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    After a couple weeks of unsuccessful attempts to locate a NP205 from a TH350 w/ fixed rear output, I found one this morning. luckily it was 15deg out so it made my search that much easier, whens this global warming thing going to kick in again? Anyway, I either read from a post here or on a site that you should try your hardest to get the figure 8 piece that mounts between the transfer/tranny. I couldn't find it. I'll be using the adaptor to mate to a TH700 but I still need that piece. How hard are they to come by? Is it more than just a spacer? thanks in advance.
     
  2. imiceman44

    imiceman44 1 ton status

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    Well the one you want should have the square 4 bolt adapter to go on the th350 or 700 end. without that one you might as well have gotten the 205 from a 465 you can't do much without the adapter.
    Is the input shaft a coarse 10 spline male or a fine 27 spline female?
     
  3. Sandman

    Sandman 3/4 ton status Author

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    You can get them from the dealor for lots of cash. I talked mine down to $265 for a new one. I bought another one off the board for a $100 for a spare and I consider myself lucky. I also looked for a few weeks for a used one before I gave up and bought the new one.
     
  4. Sandman

    Sandman 3/4 ton status Author

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    Oh yeah, It will be hard to find because they only made them for one year. 1980.
     
  5. imiceman44

    imiceman44 1 ton status

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    Hey Sandman,
    This combo wasn't only in 80, it was the only option in 80 but it was an option before but not that common.
    It started as an option in 70 or 71 and I think the only years it wasn't an option was in 76-77. you could only have 350/203 or 465/205.
     
  6. Sandman

    Sandman 3/4 ton status Author

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    I've never heard of the TH350 to 205 factory combo before '80. It was my understanding that you got the 203 with the TH350.
     
  7. Blazer1970

    Blazer1970 1/2 ton status

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    Every '70 - '72 GM 4WD truck with an automatic (and there were a lot of them) got the TH350/NP205. After the 203 came out in '73, you saw a lot less of them, but a '73 K20 I just parted out had the 350/205, so I know it was available as an option, or maybe standard on the K20.
     
  8. imiceman44

    imiceman44 1 ton status

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    /forums/images/graemlins/thumb.gif
    My info isn't always accurate but always in the ballpark.
    Thanks for backing me up. this time I was right on the money.
     
  9. Sandman

    Sandman 3/4 ton status Author

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    Well I'll be damned. Looks like you learn something new everyday. The reason for my confusion is when I went and bought one, The dealor and the yards that I went to, only showed that combo for that year.
     
  10. TorkDSR

    TorkDSR 1/2 ton status

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    is the 205 for 1980 fixed yoke?

    all the 70-72 are...at least mine is
     
  11. RATAH

    RATAH 1/2 ton status

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    my 205 is a 1971 and its a fixed yoke front and rear with a th350
    (i was told it came from a 1 ton truck when i bought it)
     
  12. Blazer1970

    Blazer1970 1/2 ton status

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    The 1980 205s have slip yokes.
     
  13. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    **I believe** that all 205's from 1980 on have slip yokes UNLESS it's in a 2 door cab chassis truck or a 4 door pick up / cab chassis
     
  14. BowtieRed

    BowtieRed 1/2 ton status Author

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    i don't think from 77-79 it was an option with the th350.
     
  15. imiceman44

    imiceman44 1 ton status

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    Well as I stated in the above post, I know for a fact from broshures that 76-77 didn't have that option. so I guess when they started the new style half cab top they didn't leave room for much options, but I know before 76 it was an option and they were all fixed yoke. in 80 the 205 was the only option and it was slip yoke.
     
  16. tarussell

    tarussell 1/2 ton status

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    If you can find a 1971 or 1972 350/205 adapter , get it. These years have an extra bearing for additional shaft support in the adapter itself. GM dropped it starting in 1973.
    The coupling sleeve is machined for the bearing , so get it too.
    Tom
     
  17. DukeBoy88

    DukeBoy88 1/2 ton status

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    Thanks for the info, I'll keep looking.
     

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