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78 K20

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by walt88, May 5, 2001.

  1. walt88

    walt88 1/2 ton status

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    My brother might be getting a 78 k/20 for like 500$. What axles and transfer case would that come with?? I know its got a TH400.

    [​IMG]<font color=red>1988 Chevrolet K5 Blazer, Middletown, NJ (07737).</font color=red>
     
  2. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Well it should have a 14FF. Front is a Toss up between 10 bolt and a D44 but it will be 8lug like the rear. TH400 could be optioned with either the 203 or the 205. 205 is most common. If it has to 203 then your on your way to a Doubler. the TH400-203 is a hard find. Maybe as hard to find as a TH350 205 fixed yoke. Just not as many folks looking for it till the Doubler came around.

    Diging it in the dirt with my K5's
    Grim-Reaper
    <A target="_blank" HREF=http://grimsk5s.coloradok5.com/>http://grimsk5s.coloradok5.com/</A>
     
  3. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Yep, Grimmy tells it like it is. Sounds like its a very good buy for that amount! [​IMG]
     
  4. Ancient_4X4

    Ancient_4X4 Registered Member

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    I have the TH400-203 combo!! What's a doubler??? Enlighten me!
     
  5. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Check out <A target="_blank" HREF=http://offroaddesign.com>http://offroaddesign.com</A> and read about the info on the Doubler. Its simply a kit to mate the NP205 to the range box of the NP203 to double the low range for a 4 to 1 ratio.
     

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