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350 trans question

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Suzukirider85, Sep 15, 2002.

  1. Suzukirider85

    Suzukirider85 Registered Member

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    i have a 1975 chevy pickup with a 350. it has been siting for a while and now the transmisson is shot. i am not that smart when it comes to transmissons but i hope the get the basics on the post. what do 4x4 use a long or short shaft? is there a difference between a 350 and 350 turbo or is there no plain 350 and just 350 turbo. and will a 400 turbo fit my 75 350. thanks
     
  2. dremu

    dremu Officious Thread Derailer Premium Member

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    I can answer some of that. A 350 is a TH350 is a General Motors Turbo Hydramatic 350, all the same. The "turbo" part just comes from the Genera'ls brand name, so it's not any different from a regular 350.

    A 400 will go, and is a hell of a good tranny. You will, however, have challenges fitting it to your transfer case, and someone else will tell you more about that.

    -- A
     
  3. zakk

    zakk 1/2 ton status

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    the 400 is longer. it will not fit without a new x-member, worked driveshafts and placing the t-case handle in a spot where it will not bind.
     
  4. or2play

    or2play 1/2 ton status

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    Plus a TH350 has a 27 spline output shaft. A TH400 has a 32 spline output. In a 4x4, a turbo 400 will not fit to a transfer case that was mated to a turbo 350, and vise versa.
     
  5. Suzukirider85

    Suzukirider85 Registered Member

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    now when i look for a replacement will i need to go for a short shaft or a long shaft(i have seen both in the local trader post and want to get the right one). thanx
     
  6. zakk

    zakk 1/2 ton status

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    the best bet is to either get a 350, so that you KNOW it will work with your 203, or look for a 400 already mated to the t-case of your choice.
     
  7. or2play

    or2play 1/2 ton status

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    if you stick with the 350, yes you will need the short shaft. It sticks out the case about 7/8 of inch. and of course the won't be a tail housing on the tranny.

    the turbo 350 has 4 output shaft options. 3 are for 2 wheel drive vehicals. the last one is for all 4 wheel drives.
     

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