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88 Transfer Case Capabilities?

Discussion in 'The Garage' started by LIL QIK, Feb 18, 2005.

  1. LIL QIK

    LIL QIK Registered Member

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    I was hoping someone could give me an idea of what the 88 model transfer case could handle in respects to power and torque. It's the aluminum transfer case for those a little unfamiliar with the year.

    I've got a twin turbo 383 that I'm thinking of dropping into the truck. I've already got the Art Carr trans behind it....but am a little unsure of the transfer case holding up. If it does cut loose..........does anyone know if they are hard to rebuild.

    A apologize if this has already been asked.....but my searches were know good.

    Thanks for any and all advice.

    I know it's little un-orthodox to drop so much power into a big old truck......but I really like the truck and I'm totally comfortable driving it. Not to mention the 68 Camaro it was originally going in is a long way off from being completed.
     
  2. Hossbaby50

    Hossbaby50 3/4 ton status

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    The NP 208 case (which is what you probably have) can take some decent amounts of power. If you are going to be stomping on the pedal hard alot then I would swap in an NP205 just to be safe.

    I rockcrawl my NP208 case with very little problems. It works great and offers a good lowrange. It is easy to rebuild. If you are going to be slamming on it hard then you might want something a little more stout but if you are half way sane then I would run it.

    Its your choice though. An NP208 could survive, and an NP205 should survive.

    Harley
     
  3. Hossbaby50

    Hossbaby50 3/4 ton status

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    P.S. I have a 300HP crate 350SBC with TPI injection on it. I have a decent amount of power (not a 383 w/turbo though) and I am not affraid to floor the pedal when I feel like it on the street or offroad. I am more worried that my 700R4 is going to blow up then I am about my NP208. If the 208 breaks I can always fix that in very short order.

    Harley
     
  4. LIL QIK

    LIL QIK Registered Member

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    Thanks........I appreciate the reply. I won't be stomping on it or anything like that. And it doesnt' have a stall so there won't be any sudden jolts to the system. I hardly ever go off road with it. The engine normally puts out 1000 hp and 1200 tq............but I firgure that I can just turn the boost down while in the K5..........Is the 205 the cast iron case and if I decide to run it........what other changes will I need to make?
     
  5. beater_k20

    beater_k20 Banned

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    sounds like you need to step up to something a little more heavy duty. that kind of power will not only eat the trans and transfer case, but through gear reduction will likely kill even the beefiest of 1 ton axles.
     
  6. Hossbaby50

    Hossbaby50 3/4 ton status

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    Wow, 1000hp and 1200ft, that is probably more then I would be willing to run threw a 208 or a 700R4. For that kind of power I would seriously look into a T400 & NP205 case. I would also have the TH400 beefed up a little bit just because.

    The major things you would have to change is driveshafts, and use the crossmember from the TH400/205 setup. Otherwise it is pretty bolt in. Tcase shifter hole would probably need moved too, but I don't know that for sure.

    If you drive like a grandma then a 700R4/208 might work for awhile, but I don't think either of them are going to take that kind of power for an extended amount of time. Even the most beefy 700R4's I have seen are only rated to about 600-700HP.

    I knew a 383 with turbo would be a stout motor but I didn't think it would have numbers like that. :blush:

    Harley
     
  7. RustBuket

    RustBuket 1/2 ton status

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    I'd say you'll definately need a 205 or an Atlas case. Your transmission will also be on its way out too with that much power. I have no idea what kind of tranny would hold up to that....maybe a planetary drag racing tranny....:D
     

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