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turbo 400 ?

Discussion in 'The Garage' started by 77scottsdale, Jan 21, 2007.

  1. 77scottsdale

    77scottsdale Registered Member

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    i have a short tailshaft th400 looks like this one but its stock not b&m[​IMG]


    will a np205 and adapter plate work with it i think it is 4.00in shaft 32 spline came out of an 85 2wd lwb
     
  2. cybrfire

    cybrfire 1 ton status Vendor GMOTM Winner

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    pretty sure the tailshaft is too long once the tailhousing is removed.
     
  3. 77scottsdale

    77scottsdale Registered Member

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    i know it aint the right way to do things but can i cut some of the shaft off
     
  4. cybrfire

    cybrfire 1 ton status Vendor GMOTM Winner

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    I've heard of some guys doing that with some combinations. Not sure if it was a 400. watch the spline engagement length. It could well be that after you cut it short enough, there won't be enough left. Can't remember how long the splines are on that trans.
     
  5. goldwing2000

    goldwing2000 Guest

    Also be careful of how you cut it. If you get it too hot you'll lose the heat-treating and it'll break under load.
     
  6. 77scottsdale

    77scottsdale Registered Member

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    here is the specs of the one i have 4.5" shaft with 2.75" of that being spline
     
    Last edited: Apr 21, 2007
  7. 77scottsdale

    77scottsdale Registered Member

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    if it can be cut i will use a band saw with lots of oil or some water, does any one have the specs for a 4wd th400
     
  8. Jimbo*

    Jimbo* 1/2 ton status

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    If your tranny is exactlly like the one you pictured, AND your transfer case is the short 32 spline input figure eight style with the tall adapter, it will work.
    Jimbo
     
  9. 77scottsdale

    77scottsdale Registered Member

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    do u have a picture of a figure eight style and a tall adapter
     
  10. u2slow

    u2slow 1/2 ton status

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    The 2wd fixed-yoke TH400 uses the same output shaft as the 80-84 TH400/NP205.

    The 85+ TH400/np205 (round pattern) version uses a shorter shaft.
     
  11. 77scottsdale

    77scottsdale Registered Member

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    what about a 208 and a th400 adapter
    [​IMG]
     
  12. 77scottsdale

    77scottsdale Registered Member

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    its not a fixed yoke it has a bushing and all that the yoke slides into on the tail shaft housing
     
  13. 77scottsdale

    77scottsdale Registered Member

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  14. goldwing2000

    goldwing2000 Guest

    Do you have the t-case yet? If not, what about going divorced?
     
  15. 77scottsdale

    77scottsdale Registered Member

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    yea i thought about that too, are divorced dodge cases easy to find
     
  16. goldwing2000

    goldwing2000 Guest

    Availability comes and goes. Sometimes I see a lot of them, sometimes none for months. It's a good route to go if you have the room for it, though.

    It generally requires custom-length driveshafts but the payoff in cheaper trannys and better driveline angles is worth it, IMO. Besides, if you get a good HAD or Tom Woods shaft, you're good pretty much forever. Maybe just need to buy u-joints occasionally, same as with any other truck.
     
  17. sweetk30

    sweetk30 professional hooker Premium Member

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    look for a international truck or suburban style body one. thay have all divorced cases and thay are 205. but the best factor is thay are 34" frames. gm is 34" frames. so grab all the mounting brackets and bolt it in basicly.
     
  18. goldwing2000

    goldwing2000 Guest

  19. goldwing2000

    goldwing2000 Guest

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