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info needed on np208 or nv231/241 etc

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by m j, Jan 4, 2002.

  1. m j

    m j 1/2 ton status

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    for use on sm465.
    pics would be great
    spline count, adapter, dimensions, and P#s etc.
    thanks

    both my sm465s have worn output shaft so finding replacement is on the menu and would like to choose correct one that will work for future plans

    thanks in advance for any help

    Michael

    formerly 77chev
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    81 and up SM465's that came with the NP 208 were all 32 spline. Should have the round 6 bolt generic type T-case adaptor and I would guess the 241 would bolt up to it without too much problem.

    I had a SM 465, NP208 out of my Jimmy laying around for a few years and got rid of it for almost nothing before I found out it was 32 spline...[​IMG]

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  3. m j

    m j 1/2 ton status

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    adapter length?

    formerly 77chev
     
  4. Russ

    Russ 1/2 ton status

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    8.5 inches long
    Russ
     
  5. m j

    m j 1/2 ton status

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    cast iron?

    formerly 77chev
     
  6. Russ

    Russ 1/2 ton status

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    Yes, it is cast iron. I have one outside. If you need any specifics for it I can get them for you in the daylight tomorrow.
    Russ
     
  7. 95 Silverado

    95 Silverado 1/2 ton status

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    here's a pic: <a target="_blank" href=http://community.webshots.com/storage/1/v0/5/31/62/28553162PebQwyfAAV_ph.jpg>http://community.webshots.com/storage/1/v0/5/31/62/28553162PebQwyfAAV_ph.jpg</a>

    '95 Chevy Silverado 1500
    5.7 V8-NV4500- 3.73 rears
    See My Toys: <a target="_blank" href=http://community.webshots.com/user/wdb172454>http://community.webshots.com/user/wdb172454</a>
     
  8. m j

    m j 1/2 ton status

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    thank you

    formerly 77chev
     
  9. m j

    m j 1/2 ton status

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    have you done a comparison of the planetaries in a 241 vs 208?
    Klune stsrted with 231s for the jeep crowd I think, wondering if the 2XX have any advantages over 208

    adapter casting looks thinner then the old stuff

    formerly 77chev
     
  10. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I was talking to RyeGuy about good planetary candidates and he recalled the 208 was difficult to use for some reason. The 231 is a 3 gear planetary versus the 241 6 gear planetary.

    32 spline 241 planetary sets are not hard to find...any 1/2 ton Chev from 88 and up with the 5 speed had one. There must be quite a few in the wrecking yards. I was thinking of checking some tranny shops out. You would think they'd see a fair number of cracked and broken T-cases.

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  11. Russ

    Russ 1/2 ton status

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    What year vehicle did that adapter come from? The one I am using looks a little different. Mine has a flat mounting face (no grooves) where it bolts up to the 241 and the crossmember feet are up high for the double hump style crossmember.
    Russ
     
  12. 95 Silverado

    95 Silverado 1/2 ton status

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    it's from an '83 full-size blazer

    '95 Chevy Silverado 1500
    5.7 V8-NV4500- 3.73 rears
    See My Toys: <a target="_blank" href=http://community.webshots.com/user/wdb172454>http://community.webshots.com/user/wdb172454</a>
     
  13. Russ

    Russ 1/2 ton status

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    Thanks, I guess the 241 and 208 adapters must be a little different. Mine is from my 90 Blazer. I'm guessing the bolt patterns and lenth are probably the same though.
    Russ
     

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