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np205 or np241?

Discussion in 'The Garage' started by wkbrdrob, Dec 1, 2006.

  1. wkbrdrob

    wkbrdrob Registered Member

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    So my tranny guy has a 241 laying around his shop. I'd love to put a 205 in my '86 and ditch that damn 208, but the expense and mods needed to put a 205 in seem slightly daunting, especially without a welder. And that's not even mentioning the new driveline.

    If money grew on trees, it be the 205 hands down, but what if I got the 241 for nothing, rebuilt it, and threw and SYE kit on it at some point? :doah:
     
  2. b454rat

    b454rat 1/2 ton status Premium Member

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    241 is a little stonger than the 208, but I don't think by much. What kind of tranny do you have that makes a 205 so expensive??
     
  3. wkbrdrob

    wkbrdrob Registered Member

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    I've got a 700R4. I might be way wrong, but I figured by the time I source at 205, rebuild it, get the adapter for the 700, and monkey with crossmembers, I might as well just put a SYE on a 241. I've currently got an unhealth 305 in it right now with a fuel-injected 350 in the future, but I don't plan on making a ton of HP so I'm not sure I even need the 205. Scratch that, you need a 205, but is it worth the add't cost?
     
  4. resurrected_jimmy

    resurrected_jimmy 1/2 ton status

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    241's will stand up to diesel power. The big draw to a 205 is the cast iron case. If you aren't going to be using your T-case for a skidplate I would run a 241. It has an excellent low range(2.72), almost double what a 205 has (1.96).
     
  5. bowtiepower00

    bowtiepower00 1/2 ton status

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    If you're doing a mild-moderate build, 3/4 ton axles, tires smaller than 38's, the 241 with SYE should be fine, especially if you protect the case itself. You also get a better low gear ratio. If you're doing a full 1-ton build with big horsepower and big tires, or bouncing the case off rocks, you'll want the 205. Also, many 205's (mine included) have a slip yoke.

    With your 700, etc., I'd grab that 241- unless you've been blowing up 208's. As mentioned before, the 208 and 241 are pretty similar, I think the main difference is better oil flow and lubrication on the 241.

    205's aren't all that spendy, and I wouldn't let the x-over mod's scare you if a 205 is really what you want. You can twin stick a 205.

    Does anyone know the weight difference between a 208/241 and 205?
     
  6. b454rat

    b454rat 1/2 ton status Premium Member

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    205 is heavier than hell, never picked up a 208/241. But seeing that they are aluminum, can't be that heavy. Inless the 205 was sitting outside or underwater, why rebuild it?? They are virtually indescructable. The one that was in my truck sat for who knows how long, put oil in and ran it and never had a prob with it. Rear seal was ever so slightly leaking, but I never put a seal or gasket in it.
     
  7. chevysmithz71

    chevysmithz71 1/2 ton status

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    Twin Sticking was mentioned above. I know what they do but is there a real advantage to having it on the trail? How about clocking it at the same time??Can it be done?
     
  8. wkbrdrob

    wkbrdrob Registered Member

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    I man-handled my 208 out by myself and I'm not a big guy. I'd love to get the 205, but a 241 seems like an easier swap. Anyone have a 205 behind their 700? What adapter is need to make them go together? Can you clock the 205 behind the 700 as well? And I'd like to get a twin stick going as well. I'm assuming from the conversations that you can't do that with a 241?
     
  9. resurrected_jimmy

    resurrected_jimmy 1/2 ton status

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    205's came with two bolt patterns for mating to the trans, figure 8 style and six bolt round. You have to tap two holes in to the figure 8 style to make it fit the six bolt round adapters for mating and/or clocking it up. You cannot twin stick a 241. IIRC a 241 weighs about 125 lbs. ORD and Novak are two companies that I would look at for adapters. Novak's knowledge base on their website is very well put together and answers a lot of questions. I really dislike the 700 trans and have not had good luck with them. I would venture to say that if your running a 700 you don't need a 205.
     
  10. jp0863

    jp0863 1/2 ton status Premium Member

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    a 241 doesnt weigh 125, it's about 80lbs at most. the 205 is probably close to 125, but definately not the case for the 241. it can be dealt with single handedly. i have a 241 with the sye and it works great. i thought about swapping it for an atlas, but only for the lower gearing, not for the strength. the 241 is plenty strong. it is used behind the cummins diesel, which even with a modified cummins, it will handle quite a bit of torque. more than a 350 can put out on its best day heavily modified. i had a 2002 dodge with somewhere in the neighborhood of 800 lb/ft torque and never had a problem at all with the 241. and i drive with a heavy foot all the time.
     
  11. mike reeh

    mike reeh 1/2 ton status

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    one way to put a 205 behind a 700r4 is use advance adapters output shaft for the 700... then everything else bolts up like stock.. you use a th350-np205 adapter, and of course a 27 spline np205.... thats the setup currently in my truck.
     

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