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TURBO 400 OR 700r-4, I think I may go with a 400

Discussion in 'The Garage' started by MEGALADON, Oct 10, 2005.

  1. MEGALADON

    MEGALADON 1/2 ton status

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    After hearing how most here are having problem with 700's, I think
    I want to put the 400 that came with my 454 out a 1 ton truck. I had to buy a shaft for my 700R-4 in order for it to fit up, do I have to buy a shaft for the 400 to????? I know the tail shaft cover has to come off.

    If I did this would the transfer case have to be moved?? I know the 700 would
    fit without any mods to the transfer case, because it came with a overdrive when new.

    Its on my 82 GMC truck, I have a 350 trans in it now, but the case is cracked.
    It still runs and drives with the BB, but I know i'm gonna bust it soon.
     
  2. 74757685k5

    74757685k5 1/2 ton status

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    go 400 with a BBC.
     
  3. Hossbaby50

    Hossbaby50 3/4 ton status

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    Get a TH400. I have a 700 in my truck and I have a 400 in my garage waiting for the 700R4 to die. With a BBC I wouldn't even consider a 700R4 because you would have to spend all kinds of money on the tranny to get it to live for a long time behind a BBC.

    Harley
     
  4. sweetk30

    sweetk30 professional hooker Premium Member

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    350 and 700 = 27 spline shafts


    400 = 32 spline shaft

    adaptor to tcase is 4 bolt for 350 700 tranny

    400 is 6 bolts.

    bbc best to go 400 tranny. and as it had 454 factory it should have the better clutch packs in it than a light duty use 400. by this i mean higher quanity of clutches per pack.
     
  5. MEGALADON

    MEGALADON 1/2 ton status

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  6. sweetk30

    sweetk30 professional hooker Premium Member

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  7. MEGALADON

    MEGALADON 1/2 ton status

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    THANKS sweetk30, My next question would be does the t-case have to be moved, or all I need it the adapter on e-bay :thumb:
     
  8. sweetk30

    sweetk30 professional hooker Premium Member

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    also need the 32 spline input. this will require spliting the tcase . good time to freshen it up. and also need the tail shaft for the tranny.
     

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