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Muncie 4 speed, good trans for my k5? will it mate to a np205?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Silver84k5, Jun 5, 2002.

  1. Silver84k5

    Silver84k5 1/2 ton status

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    i can pick it up for 100 bucks and supposedly it works fine, Im pretty sure it is out of a four wheel drive, (if not i wont buy it). But would it mate up to my t-case? np205
     
  2. m j

    m j 1/2 ton status

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    if it is sm465 tranny then yup it will work in a 4x4 with a 10spline transfer case
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    External shift linkage=no good for a truck. Internal shift parts, (Sm465, etc) it should be fine.
     
  4. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Nope it's a car tranny. Sure would be nice in my 70 LeMans /forums/images/icons/smile.gif
    I know where a 465 4x4 tranny is for $100. Wish we didn't live on oposite ends of the country or I would make you a trade.
    (hint: I would jump all over that tranny if it's in good shape....they bring between $300-500 depending on condition and what gear ratios it had around me)
     
  5. Silver84k5

    Silver84k5 1/2 ton status

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    so it might be a good thing to buy then sell off to make a little extra cash? What should i look for to make sure it is a good trans? Thx everyone
     
  6. Sandman

    Sandman 3/4 ton status Author

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    Buy it and then sell it. Check out e-bay and see how much they are going for. You might be surprised.
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    Do some research on the Muncie M20, 21, and 22. Good luck with it being a real M22 though lol. You re on the right track for a Muncie with an Aluminum case. That doesn't identify it positively as a Muncie, but if its cast iron, it definitely is not an M-20/21/22.

    FWIW, I believe the SM465 *is* a Muncie as well, but the whole "internal/external" linkage thing comes into play for ID there. Or check just about any tranny web site, "heavy duty" truck trannies are much different physically from car ones.
     
  8. m j

    m j 1/2 ton status

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    <blockquote><font class="small">In reply to:</font><hr>

    Im pretty sure it is out of a four wheel drive

    <hr></blockquote>

    this leads me to believe it isnt a car muncie
     
  9. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Dorian, SM stands for Saginaw/Muncie. If that tranny is out of a 4x4 it prolly isn't an M-21 and likely is a 465 or possibly a 420 if it's really old.

    Rene
     
  10. Silver84k5

    Silver84k5 1/2 ton status

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    ok the guy told me the Case was cast iron, This guy doesnt wheel and told me that i prolly wouldnt want it cuz it was so low geared, (heh inside im like "YES") i also am pretty sure i remember saying it came out of a mid 60's 4x4, what can you guys gather from this info? Thank you
     
  11. Lazydog

    Lazydog 1/2 ton status

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    I can take a picture of a SM465 for reference If you'd like. I have one sitting on the side of my house. I don't have the time tonight.
     
  12. 70~K5

    70~K5 1/2 ton status

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    I had a Munsie M22 in a '46 CJ2A good trans for sand running. But i had a warn overdrive, twin stick tc, and 5.38s and 33"s. Plus the pumped up 327 under the hood.
     
  13. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Mid 60's tells me SM 420 possibly. 7.05:1 first gear...

    Rene
     
  14. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    IIRC the SM465 came out around 67 or 68. I guess that is on the edge of the mid 60's. If it's the SM420 it might be mated to a T221(?) case. Kind of an oddball set up. I would look for a SM465/NP205 combo. Look at some pics or take some &amp; post them here.
     
  15. Silver84k5

    Silver84k5 1/2 ton status

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    thx everyone, ill see waht i can come up with
     
  16. m j

    m j 1/2 ton status

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    sm420 has a big bulge on one side.
    my sm465 has a cast in raised number starting with 465...

    there is a few page article on rebuilding sm465 from a 4x4power magasine <a target="_blank" href=http://community.webshots.com/album/33077846NUyKwl>HERE</a> along with a bunch of other misc articles I scanned
     

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