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LENGTH OF TRANS??

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BLUESMAN, Feb 24, 2002.

  1. BLUESMAN

    BLUESMAN 1/2 ton status

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    I have a TH350/203 combo that I'd like to swap out and install a TH400/208 combo.Does anyone know if the total lengthes are close or will I require new driveshafts?I have the front shaft that came w/ the TH400/208 combo(that should work).What I'm unsure about is the rear.BTW the K/5 has beed converted to 3/4 ton diffs, so right now the rear fits perfect with the flipped rear shackles.Thanks for the info!
     
  2. BLUESMAN

    BLUESMAN 1/2 ton status

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    ANYONE???

    Help!!! I've fallen and I can't get it up!
     
  3. Quack_Addict

    Quack_Addict 1/2 ton status

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    Check out this site... it should be able to help answer your questions.

    <a target="_blank" href=http://www.tciauto.com/tech_info/trans_dims.htm>http://www.tciauto.com/tech_info/trans_dims.htm</a>

    Daddy always said a Phord is about as useful as a shovel with a rope handle.
     
  4. CaptCrunch

    CaptCrunch 1/2 ton status

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    Here is the info I have...
    th350 trans=21 1/2"
    th400 trans=24 1/4"
    th700r4(4x4)=23 3/8"

    I have no idea on the 203 length compared to the 208 though. I have a 208 case I could measure up tonight for ya and then factor in the adapter. You may be able to use a drive shaft from a 700r4/208 and that and the 400 are similar in length, but definetly research it more. I would see if some one can measure a 400/208 combo for you. I assume your 203 is fixed yoke so it would be tough to say if you could just put a slipe yoke on the end of it and go, i'd dobt it. I would grab the th400/208 shaft (I assume it is from a pickup) and have it shortened. Most local driveline shops will do this for 50 to 100 bucks. Hopefully I have given a little help to ya... if not well then your post is back on top [​IMG]

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  5. BLUESMAN

    BLUESMAN 1/2 ton status

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    Phoenix(but it\'s a dry heat...like an oven!)AZ.
    Thanks everyone...turns out that the TH400/208 combo is about 3" longer than the TH350/203 combo.So I'm back to square one.....needing a 203 frt. shaft or 208 rear shaft!!

    Help!!! I've fallen and I can't get it up!
     

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