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TH350 replacement 79' Blazer

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BlueKnight, May 1, 2000.

  1. BlueKnight

    BlueKnight 1/2 ton status

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    TH350 replacement 79\' Blazer

    A friend of mine in a group I belong to wants to sell me two really nice condition TH350's. one short shaft and one long shaft. I have a TH350 transmission already but was wondering if I went with a short shaft would this solve some of my driveline issues being so short and steep of angles or do I already have a short shaft installed?


    <font color=purple>79' K-5 396cid 600hp, TH350, NP203</font color=purple>
    http://79blueknight.homepage.com
     
  2. Andreas

    Andreas 1/2 ton status

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    Re: TH350 replacement 79\' Blazer

    Isn´t your current th350 of the "married" type (t-case bolted directly to the tranny)?

    Andreas

    406cui of pure sh*t[​IMG]
     
  3. BillR

    BillR 1/2 ton status

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    Re: TH350 replacement 79\' Blazer

    I just had my TH-350 rebuilt. I like it real well, although I'm not running anywhere near 600 hp!

    Blazin' in Flagstaff
     
  4. Jason73K5

    Jason73K5 1/2 ton status

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    Re: TH350 replacement 79\' Blazer

    I believe that short-shaft and long-shaft refers to two wheel drive applications. As far as I know, all TH-350 for 4WD's are the same length. Anyone want to confirm this?
     
  5. mudfanatic

    mudfanatic 1/2 ton status

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    Re: TH350 replacement 79\' Blazer

    mine is married to the 203, the 203 has it's own tailshaft.
    '77 K5

    <font color=red>mudfanatic</font color=red>[​IMG]
     
  6. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Re: TH350 replacement 79\' Blazer

    The actual case up to where the tail shaft housing is the same. The short/Long does refure to how long the tail shaft housing and and shaft are. This is not a 4x4 TH350 but you can make it one if you choose. The best TH350 is the 77-80'(80 was the TH350c that had a lock up converter) that came in 4x4 trucks. They had a thicker bellhousing that would accept the heavy duty belhousing cover. This cover has a provision for braces that bolt to the motor mounts. You can make these tranny's work by swaping the output shaft to the 4x4 model shaft but this does require that the whole tranny be taken apart to get to that last shaft.
    FYI you can rebuild a TH350 for about $125 in parts. that would include new clutches, steels, seals and a rebuilt converter. I have rebuilt mine and it really wasn't that hard. Just took some creativity with tools.

    Diging it in the dirt with my K5's
    Grim-Reaper
     

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