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what trans on 454?

Discussion in 'The Garage' started by spincast375, Jun 17, 2005.

  1. spincast375

    spincast375 1/2 ton status

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    Location:
    Tennessee, U.S.A.
    im lookin at buying a new trans because my current th350 was rebuilt by my trucks previous owner and it has a hairline crack in it(no relation... i dont think)

    anyways i might have a pretty good deal on a th400 and was wondering if thats a good match, 454/th400

    i was talkiin to a guy on the phone at the local trans shop and he said a 700r4 was not heavy enough for a 454, idn? is it?

    so whats a good mate to a 454... another th350/th400/or 700r4?

    also, what do you guys think of a np231 t-case
    personally iv never heard of it, but im a newbie, so...

    thanks
     
  2. RustBuket

    RustBuket 1/2 ton status

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    A 700-r4 will quickly die in heavy truck with a big block unless its really beefed. The torque those motors put out is pretty awesome. I would go with a TH400.
     
  3. sweetk30

    sweetk30 professional hooker Premium Member

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    np 231 is s-10 type trucks. if you need to go th400 you need a new adaptor to tcase and input gear. or get the whole setup from a th400 unit. and the drive shafts will need to be reworked. longer frt and shorter rear. also dont forget th400 has higher low gear then th350 . th350 is better low gear.
     

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