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Turbo 400 output shaft lengths

Discussion in 'OffRoad Design' started by thebigdaddyof2, Apr 25, 2005.

  1. thebigdaddyof2

    thebigdaddyof2 1/2 ton status

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    From the info on your site, I understand there are 3 different lengths of output shafts for the Turbo 400- depending on the version of t-case used.

    But what about the later, round pattern 205?
    Do the later T400s have the same 4.5" shaft stickout like the older T400s?

    thanks
     
  2. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    No, it's shorter - I think it may be the same as a 208 application. I have one at home and can post a measurement tonight if needed.
     
  3. thebigdaddyof2

    thebigdaddyof2 1/2 ton status

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    Nvrenuf,
    Any idea on the length of the shaft stickout?
     
  4. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    Dude I'm sorry I forgot about this! :doah:

    The tailshaft "stickout" for an '85+ TH400 with a round pattern 205 = 2.25".

    :thumb:
     
  5. thebigdaddyof2

    thebigdaddyof2 1/2 ton status

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    Hey, no problem.
    Thanks for the info!

    If you measure ~2.25", I am wondering if this is not the same as the 208 version- which is stated by SW to be ~2.5".

    If so, I suppose GM had only one T400 output shaft length to deal with (by the mid 80s) and thus created the long input 205.

    Can anyone verify this?
     
  6. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    In the tranny output shaft world, 2.25 and 2.5 are the same thing, we run into 1/8" variations all over the place.
    I'm guessing that the standardization thing is the reason for the long input gear change. It does make it easy, you use one TH400 for everything, 3/4T and 1T. We've run into some military trucks with long inputs in fig 8 cases, I'm guessing for the same reason.
     
  7. thebigdaddyof2

    thebigdaddyof2 1/2 ton status

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    Information from the man who's probably seen it all!

    Thanks, Stephen.
     
  8. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    Funny thing is, despite all the exposure to different stuff, I still get surprised.
     
  9. BoondocK5

    BoondocK5 1 ton status Author

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    I'm going dredge this one up from the bottom.
    I have the 2.25 inch output shaft. Trying bolt this up to my 241 doubler, I need the next size longer output, any one know what that is and where I can get it?
     
  10. sweetk30

    sweetk30 professional hooker Premium Member

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  11. 1977k5

    1977k5 3/4 ton status Vendor

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    We can get you any of the TH400 output shafts.

    Are you sure you need the longest one? I would think you need the one you have which matches a 208 or 241 adapter.
     

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