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NP208 Vs. NP241 Strength wise

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by K5er4Life, Mar 2, 2004.

  1. K5er4Life

    K5er4Life 1/2 ton status

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    I am afraid I am going to break my 208 anyday here, so is the 241 anymore stout? I want to keep my low range thats why I want the 241. And if I go with the 241 is it the same length and have the same spline count as my 208, assuming I use the mechanical speedo version? Thanks for all your help guys. /forums/images/graemlins/laugh.gif
     
  2. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    yea the 241 is stronger (not a ton but enought) and plus it will bolt in where a 208 came from /forums/images/graemlins/woot.gif, considering they are both from the same tranny
     
  3. K5er4Life

    K5er4Life 1/2 ton status

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    awesome, how hard are they to come by?
     
  4. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    they can only be found in 89-91 blazers and subs. but if you want a mechanicle speedo then you need a 89. 90-91 was electric speedo /forums/images/graemlins/waytogo.gif

    the ones for a 700r4 are easy compared to a 465
     
  5. Bhintz

    Bhintz 1/2 ton status

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    and you can do a SYE a lot easier on the 241 since people make kits for it
     
  6. K5er4Life

    K5er4Life 1/2 ton status

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    great thanx for the help fellas /forums/images/graemlins/peace.gif
     
  7. 84_Chevy_K10

    84_Chevy_K10 Banned

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    241 and 208 use the same chain. You can call it stronger all you want, but that's the weak point.
     
  8. K5er4Life

    K5er4Life 1/2 ton status

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    do you think I would break it running 42 and a 383? I do mostly mud running. Its a TBI 383 so its not making huge amounts of power, just some torque
     
  9. heavy4x4

    heavy4x4 1/2 ton status

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    You won't be making as much torque as a Cummins diesel...and NP241's came behind those engines...it'll be fine. /forums/images/graemlins/thumb.gif
     
  10. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    The Dodge version is the 241HD and uses a wider chain and larger sprockets than the 241C.

    Rene
     
  11. BowtieBlazer

    BowtieBlazer 1/2 ton status

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    I saw rene's writeup on the homepage and having rebuilt a 208 completely boy are they close, I am heading outside right now to drop a new chain in my 208, not broken but stretched I'll snap some pics, thats one hell of a chain to break, i'd like to see a broken one....
     
  12. Kyle89K5

    Kyle89K5 1/2 ton status

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    [ QUOTE ]
    The Dodge version is the 241HD and uses a wider chain and larger sprockets than the 241C.

    Rene

    [/ QUOTE ]

    That would be the 241HD right?

    Why does NVG state that they both have a "Max. Capacity Torque" of 5555 ft/lbs?

    The 241HD weighs more, has more fluid capacity and a higher GVW than the standard 241. If my math is right (and GAWD know's it usually isn't) then if your 383 was putting out 400 ft/lbs * 3.06 * 2 (convertor) = ~2500 ft/lbs correct? I know there is some stuff missing in my calcs, and doing a full throttle launch into a mud pit is rough BUT, the only thing strong according to NVG in their lineup is the 261SHD and the 271/271HD.

    My argument her (not that I really think it's an argument /forums/images/graemlins/wink.gif ) is that the 241 is a plenty strong case who's major weekpoint is the fact that it's made from aluminum and therefore prone to getting cracked on shiat. Chain stretch is a concern, but a new high quality chain during a rebuild should take care of that for a few years...
     
  13. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    I have a 241 from an 89' and I think it is a very nice t-cse. The low range is nice and low compared to a 205 and I have never had a problem with it besides popping out of 4HI until I had it rebuilt. The argument about the strength between a 208 and 241...I'm not sure and ahve heard that they are a little stronger but they are internally better as far as oiling and shifting. I think it is worthwhile to swap a 208 to a 241. I have never heard of anyone breaking the chain before in a 241 or 208 for that matter, but have only heard bad talk about them because of their aluminum housings and if you stay away from rocks thats not an issue. The slip yoke is another deal too...

    I would say that he would be OK with 42's and a 383 but a 205 would probably be better just because it has a higher low range, if mud is the only thing he does.
     
  14. Kyle89K5

    Kyle89K5 1/2 ton status

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    [ QUOTE ]


    I would say that he would be OK with 42's and a 383 but a 205 would probably be better just because it has a higher low range, if mud is the only thing he does.

    [/ QUOTE ]

    Depending on the final axle gears, then that will depend on which one is better still yet. It's hard to make a justification without ALL of the cards on the table
     
  15. heavy4x4

    heavy4x4 1/2 ton status

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    [ QUOTE ]
    The Dodge version is the 241HD and uses a wider chain and larger sprockets than the 241C.

    Rene

    [/ QUOTE ]

    /forums/images/graemlins/ignore.gif Oops, my bad. /forums/images/graemlins/ignore.gif

    Even still, I say the NP241C will hold up fine behind a torquey 383. An NP241 sure wouldn't be the weak link in your driveline...you'll break d-shafts, u-joints, etc before the NP241 gives way.
     
  16. BowtieBlazer

    BowtieBlazer 1/2 ton status

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    SO ya'll got me flustered and I went out and dropped my t-case and wanted some internal pics to show you how similar the 241 and 208 are /forums/images/graemlins/histerical.gif /forums/images/graemlins/histerical.gif /forums/images/graemlins/histerical.gif

    replacing the chain so i snapped a few pics /forums/images/graemlins/thumb.gif
    these first few pics are from the SYE writeup on the home page
    [​IMG]
    [​IMG]


    Now I pulled my tailshaft with one of the case halfs as I had no reason to go into the oiling part, I just rebuilt this t-case about a year and a half ago, should have done the chain then...
    where i pryed them apart at notice the pump is still attached
    Pump still in that half
    Look familiar? inside of a 208 or 241? its a 208...but look at teh writeup can you tell me
    OOPS for those rebuilding notice the needle bearings all over the bottom of the case, yeah forgot about those 120 of them, time to take a lunch
    Popping out of 2hi? those of you with the popping out of two high, see the bushings on that C-shaped part thats the range selector fork and when those bushings on the ends and center go thats what causes that problem, the reason why i rebuilt this case a year and a half ago.......
    Oh yeah and the stretched chain next to the new one, new on top old on bottom, not much but enough to cause play in the driveline, someone care to explain how you might break this?
    chain 1
    chain 2


    back outside to reassemble
     
  17. heavy4x4

    heavy4x4 1/2 ton status

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    [ QUOTE ]
    Oh yeah and the stretched chain next to the new one, new on top old on bottom, not much but enough to cause play in the driveline, someone care to explain how you might break this?

    [/ QUOTE ]

    Lots of "go pedal" /forums/images/graemlins/smirk.gif /forums/images/graemlins/tongue.gif /forums/images/graemlins/eek.gif /forums/images/graemlins/rotfl.gif /forums/images/graemlins/rotfl.gif

    Personally, I've never heard of anyone breaking one...heard of busted/bent tailshafts, but no broken chains. I don't know why Tim said they are the weak link. /forums/images/graemlins/crazy.gif /forums/images/graemlins/dunno.gif
     
  18. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    [ QUOTE ]

    Personally, I've never heard of anyone breaking one...heard of busted/bent tailshafts, but no broken chains.

    [/ QUOTE ]Me either, I've never had a problem before with mine. /forums/images/graemlins/dunno.gif

    [ QUOTE ]
    I don't know why Tim said they are the weak link. /forums/images/graemlins/crazy.gif /forums/images/graemlins/dunno.gif

    [/ QUOTE ] Thats Tim, I could find plenty of other weaker points on almost any 241 equiped rig before the t-case chain would actually break. Like 1/2 ton u joints, front 10B, stock drivelines. I bet I would break my front 3/4 10B before my case. Even a 30 spline D60 stub shaft.... BranndonC broke his stub shaft a few weeks back at Pismo with his 1ton 89' K5 with a th700/241 combo. /forums/images/graemlins/eek.gif/forums/images/graemlins/whistling.gif
     
  19. K5er4Life

    K5er4Life 1/2 ton status

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    Someone was telling me that it wasnt so much the chain that was the weak link but some internal component that breaks first. /forums/images/graemlins/dunno.gif I cant remember what it was because of my horribly short term memory /forums/images/graemlins/dunno.gifbut it was something like a sprocket or gear that under torque loads gets pushed foreward and pops out causing the case to feel as though it has gone into neutral, permenantely. I dont think I have to worry about my drivetrain much, /forums/images/graemlins/peace.gif 14ff, dana60, and high angle 1-ton driveshafts. /forums/images/graemlins/woot.gif
     
  20. dyeager535

    dyeager535 1 ton status Premium Member

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    Going off topic here, you can reply privately in a PM if you wish, but have you had the top ocver off of a 465?

    If so, do you think those 208 or 241 shift "pads" could be made to work on the 465 shift forks?

    I've been trying to figure out what pads could be made to fit the 465 forks when the nylon wears off, those in the picture look like they *might* do it. The fork looks to be pretty similar in that area...similar thickness perhaps?
     

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