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203 or 241? + new axles finally!

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Jason73K5, Jun 4, 2001.

  1. Jason73K5

    Jason73K5 1/2 ton status

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    Okay, I now have sitting at my house 2 TH-400's, one with a 241 and the other with a 203. I just pulled a 350/203 out of my '73 so I'm leaning towards putting in the 203 instead of doing a slip yoke eliminator on the 241. Are there any advantages / disadvantages to going this route instead of the 241 besides weight? Help me make a decision on this one!

    The other thing is that I finally scored some axles. I picked up a dana 44/14 bolt FF combo for $300 to replace my blown up 44 and wimpy 12 bolt. Will I be able to get 15 inch rims to fit these 8 lug axles?

    Thanks in advance!
     
  2. i think the 241 has a lower low range and is pretty strong. better than a 208 i think. after having 2 203s i would gladly take a 241.

    <font color=blue>Striving for K5 world dominance</font color=blue>
    <A target="_blank" HREF=http://bluebeast.coloradok5.com/>http://bluebeast.coloradok5.com/</A>
     
  3. wayne

    wayne 3/4 ton status

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    Yes, you can put 15 inch wheels on an 8 lug. I just ordered mine for my Dana 60, 14ff conversion. I went with a 4 1/8 backspacing so I am going to have to do alot of grinding and fitting on the calipers. Also I would go with the 241 and slip yoke eliminator kit with a rear cv shaft. My 241 has 150,000 miles on it and I don't think it has ever been apart.

    <A target="_blank" HREF=http://jamonline.homestead.com/fromthegroundupK54x4/89Jimmy.html>http://jamonline.homestead.com/fromthegroundupK54x4/89Jimmy.html</A>
    <font color=blue>Happy Trails<font color=blue>
    <font color=blue>Wayne<font color=blue>
     
  4. Jason73K5

    Jason73K5 1/2 ton status

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    Thanks for the info! Does anyone else have an opinion on the 241 vs 203?
     
  5. LittlePig

    LittlePig 1/2 ton status

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    The main thing you have with a 203 intended for a TH400 is that at some later date you can get a 205 and a Doubler kit. The 203 for the 400 is extraordinarily rare, and is the most difficult part of the Doubler setup for the 400. Also, although the 241 has a better low range, it is aluminum, an will shatter if it takes a hit, so if you plan to do any driving that takes advantage of that better low range, you will need a serious skid plate. Since I live in the Northeast, a lot of my off roading has been muddy, rough trails, rather than extreme rockcrawling. As such, I found the 203 to be more than adequate. It is a very strong case, probably only surpassed by the 205. The big problem everone had with it is the full-time aspect, which wasted fuel and tended to wear the front axle out prematurely. If you get a full-shaft part-time kit (since you're running the 400, don't just replace the spiders in the case) you will have a case at least as strong as the 261 and more durable. Hope this helps.

    Email: xiaozhu@my-deja.com
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  6. 6.2Blazer

    6.2Blazer 1/2 ton status

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    The biggest advantage the 241 has is the low range ratio. The 203 only has a 2:1 ratio while the 241 has a 2.72:1 ratio. That's about the same as the difference between 4.10 and 4.88 axles gears (when the t-case is in low range).
     
  7. Ryeguy

    Ryeguy 1/2 ton status

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    You can still buy the 32-spline NP203 gears new. A local trans shop should be able to find it in their books.

    My NP203/NP205 combo is the same length as the stock NP208 that came out of the truck, which is about the same length as the NP241. But lots heavier.

    Everything else seems to have been said already.

    --Rob
     
  8. ftn96

    ftn96 1/2 ton status

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    241 With the kit.....

    Steve Fox for President, 2004.
    Jimi Hendrix was re-incarnated in 1990 as my....JIMI
     
  9. Jason73K5

    Jason73K5 1/2 ton status

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    Thanks again for the info everyone. I'm still interested in hearing more opinions. Also, does anyone know what the weight difference is between these two?
     
  10. Jason73K5

    Jason73K5 1/2 ton status

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    One more question

    One more qurestion, would I be able to swap the 400 from the 241 to the 203 without changing input or output shafts?
     
  11. Seventy4Blazer

    Seventy4Blazer 3/4 ton status

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    203 is cast iron, and the gen 2 double is avaliable.....
    cast iron, heavy but strong....

    1974 Chevy Blazer Cheyanne. lots of plans for it....
    but it is on 33's now, with saggy old springs. i am in so cali if ya got any parts for me.
     
  12. 90K5

    90K5 1/2 ton status

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    Use the 241. I love mine for its low range...also its easy to take out, supposedly weighs less than 100 lbs.

    90K5

    See my truck at <A target="_blank" HREF=http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502>http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502</A>
     

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