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SM-465 - 700R4 conv.

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by WheelinK5, Oct 28, 2001.

  1. WheelinK5

    WheelinK5 Registered Member

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    Ok I am going to convert my sm465 to a 700r4. Has anyone done this convertion and what does it involve? Will my np208 hook up to it or will I have spline problems there?

    Any information would be greatly appreciated!

    Mark

    1985 K5
    Built 330HP crate 350, SM465, NP208, 10 bolts, Ranchos and 31X10.5 on Rallys!
     
  2. SKI-'84K5

    SKI-'84K5 1/2 ton status

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    should match i have a 700r/208 now
     
  3. Chaz88K5

    Chaz88K5 1/2 ton status

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    i would like to buy all the parts you pull off for the 465...i would like to convert my 88 to a 465 from a 700r4...maybe we could make a trade [​IMG]

    [​IMG]<font color=blue>Donations accepted for the "Build Chaz's 1972 K5 fund"!!!</font color=blue> [​IMG]
     
  4. TXsizeK5

    TXsizeK5 1/2 ton status

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    I want to do exactly what you're doing... i hate manual in trafik... need aod! lol

    6in 87' K5 w/ 35" BFG muds.
    305/Sm465/ NP208
    Kn, 4.56's.
    next...highflow cat, single inlet dual outlet flowmaster with 4" tips =D
     
  5. Danno

    Danno 1/2 ton status

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    Man, I hope you guys with SM465s are still dumping them after I get a garage! I've got a wonderful 700R4 behind my diesel that I'm looking to replace with a manual.

    1984 K5 Blazer 4x4 Silverado
    6.2L diesel, 700R4, 3.42 gears, 31x10.5" tires
     
  6. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    The SM 465 for the NP 208 is a 32 spline output...the 700R4 is a 27 spline output so the T-case will not just bolt up to the 700R4.

    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>
     
  7. WheelinK5

    WheelinK5 Registered Member

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    Do you know what is needed to make it work?

    1985 K5
    Built 330HP crate 350, SM465, NP208, 10 bolts, Ranchos and 31X10.5 on Rallys!
     
  8. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    You have to change the output of the tranny if it's not a 4wd version (which requires a complete teardown), to the short spline shaft (if it's a 4wd tranny you should be all set). And if I remember correctly, you will then have to replace the input shaft and bearing on the t-case (which would require a partial to complete teardown).

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot>http://coloradok5.com/gallery/Leadfoot</a>
     

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