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TH400 rear seal ???

Discussion in 'The Garage' started by FWP, Aug 15, 2004.

  1. FWP

    FWP CRS

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    Where is the seal between the tranny and the tcase (205), in the rear of the tranny, or in the adapter?

    Anyone have a part number handy?

    I haven't taken things apart yet, but would like to have the seal on hand.
     
  2. 70~K5

    70~K5 1/2 ton status

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    There are two seals inside the adapter, plus the "o-ring" seal between the adapter housing and the trans housing.
     
  3. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    oring? never seen an oring, always a gasket.
     
  4. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    Yeah, a 350 has an o-ring but 400 uses a gasket.
     
  5. 70~K5

    70~K5 1/2 ton status

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    [ QUOTE ]
    Yeah, a 350 has an o-ring but 400 uses a gasket.

    [/ QUOTE ]
    OK well my TH400 is in shipping and they must have the wrong pic in Ron Sessions "How To Work With and Modify the Turbo Hydra-Matic 400 Transmission" I bought yesterday. Thought it looked like a TH350 in the pic but thought the TH400 used a similar setup do to the pic they used. /forums/images/graemlins/thinking.gif
     
  6. Nonesuch

    Nonesuch 1/2 ton status

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    [ QUOTE ]
    Ron Sessions "How To Work With and Modify the Turbo Hydra-Matic 400 Transmission"

    [/ QUOTE ]

    Decent book but it does have several mistakes in it.
     
  7. FWP

    FWP CRS

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    Thanks for the replies guys. Can you replace the seals leaving the adapter attached to the tranny, or does it have to come off the tranny?

    Just need to find out what parts I'll need before I replace the seals, So far I need 2 seals, adapter to 205 gasket, and possibly adapter to tranny gasket. Does that sound right?
     
  8. Nonesuch

    Nonesuch 1/2 ton status

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    For the adater to tranny, I use the gasket. For the t-case to adapter, I use RTV.
     
  9. 70~K5

    70~K5 1/2 ton status

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    [ QUOTE ]
    [ QUOTE ]
    Ron Sessions "How To Work With and Modify the Turbo Hydra-Matic 400 Transmission"

    [/ QUOTE ]

    Decent book but it does have several mistakes in it.

    [/ QUOTE ]

    What other mistakes are in this book? /forums/images/graemlins/thinking.gif
     

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