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Transmission Question

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Stoopalini, Feb 6, 2001.

  1. Stoopalini

    Stoopalini 1/2 ton status

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    Austin, Texas
    Is it possible to swap out the 3rd gear of a TH350 for one that is larger?

    After installing my new rear Diff with 4.10 gears, I can't go over 55mph without stopping at every gas station I see. I know I could swap for a 700, but I'm curious if it's possible to swap out the upper gear?

    My TH350 runs very strong, has a shift kit, and has been rebuilt; so I'd like to keep it.

    Thanks,

    Thomas.

    -- '84 K5 Blazer --
    <A target="_blank" HREF=http://Stoopalini.coloradok5.com>http://Stoopalini.coloradok5.com</A>
     
  2. k5king

    k5king 1/2 ton status

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    you may want to go to the local drag shop and see what they have to offer,,,i know you can change the first gear but not sure about drive...or maybe even call up b+m or TCI trannies,,they will definately know what you can and can't do..

    ANYBODY LOSE THEIR JEEP????????[​IMG]
    I JUST FOUND ONE UNDER MY BLAZER!!!![​IMG]
    [​IMG][​IMG]
     
  3. Blazer1970

    Blazer1970 1/2 ton status

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    3rd gear on a TH350 is not a gear, it is direct drive. Input shaft connected to output shaft. There would be no way to turn this into an OD gear.

    Tim

    70 Blazer CST 4X4 350 SM465 NP205
    87 Burb 4X4 350
    01 GMC 2500HD 4X4 Duramax/Allison
     
  4. Stoopalini

    Stoopalini 1/2 ton status

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    Thanks for the info guys.

    I guess I'll either rebuild a 700 to make it bulletproof, or just live with &lt;60mph.

    Thomas.

    -- '84 K5 Blazer --
    <A target="_blank" HREF=http://Stoopalini.coloradok5.com>http://Stoopalini.coloradok5.com</A>
     

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