np231 or np242 which one is better??

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02-26-2009, 02:26 PM

#31

mike37

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Quote:

Originally Posted by a1racer

oh ok in the 231 though you can shift on the fly as long as it is lower than 10 miles per hour and you have to go in to neutral so you don't brake the case when you go to low. maybe the 242 is different then. what do they use to have the all wheel drive then in the 242

you should not shift into low when moving on ether
both TC work the same
the 242 has an extra position

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02-26-2009, 02:33 PM

#32

onesic6

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if you have a 231, how hard and what parts would be needed to switch to the 242?

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02-26-2009, 02:37 PM

#33

93XJLI

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Quote:

Originally Posted by mike37

you meant the part time right
the full time coupler can go bad if used wrong

no. how can you "use it wrong?"

Quote:

Originally Posted by a1racer

what are they using then this is the case on the grand's as well and i though they used a coupler. and you cant just shift from high to low with out breaking the link between the two.

grands use a viscous coupler, those are different cases. the 242 has a differential in fulltime mode that supposedly has torque-sensing characteristics. i've found that it works like a full open diff.

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02-26-2009, 02:38 PM

#34

mike37

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Quote:

Originally Posted by onesic6

if you have a 231, how hard and what parts would be needed to switch to the 242?

you would be better off swapping the TC
its not just one part you would need to change the main shaft and all the gears

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02-26-2009, 02:53 PM

#35

mike37

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Quote:

Originally Posted by 93XJLI

no. how can you "use it wrong?"

grands use a viscous coupler, those are different cases. the 242 has a differential in fulltime mode that supposedly has torque-sensing characteristics. i've found that it works like a full open diff.

if you use the full time position
for hard heavy 4x4 you destroy it

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02-26-2009, 03:06 PM

#36

93XJLI

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Quote:

Originally Posted by mike37

if you use the full time position
for hard heavy 4x4 you destroy it

says who? 5.9 durangos use the same case. its rated for over 1400 lb/ft or torque.

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02-26-2009, 03:15 PM

#37

mike37

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Quote:

Originally Posted by 93XJLI

says who? 5.9 durangos use the same case. its rated for over 1400 lb/ft or torque.

I think you are confusing full time and part time
in part time you are locked in
full time has a diff with planetary gears and a torque clutch that will get trashed if you work it to hard

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02-26-2009, 04:13 PM

#38

93XJLI

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Quote:

Originally Posted by mike37

I think you are confusing full time and part time
in part time you are locked in
full time has a diff with planetary gears and a torque clutch that will get trashed if you work it to hard

i'm not.

Quote:

New Venture documents show the 242 as being rated at 1486 ft. lbs. of torque. This is probably determined based on Full-Time position usage. Experience would say that this is a very conservative number for all other positions.

http://novak-adapt.com/knowledge/np242.htm

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02-27-2009, 05:40 PM

#39

mike37

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Quote:

Originally Posted by 93XJLI

i'm not.

http://novak-adapt.com/knowledge/np242.htm

I never said the 242 was week
just that the full time position can be damaged
more easy than the part time
because of the planetary gears

if get into a position that you spin both front tires hard and not the back
you can damage the mechanism

Last edited by mike37; 02-27-2009 at 05:44 PM.

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02-28-2009, 11:57 AM

#40

BowtieGuy3

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The 242 is a bit stronger than the 231, you can tell that by the NP/NVG numbering system... That's why the 241 is stronger than the 231.
And it's a geared for around a 48/52 torque split while in F/T, but the torque split remains while in P/T, with the exception that it locks all 4 wheels in regardless of slippage. It technically isn't "P/T"per se, but rather "acts" like a P/T case.
And if you want to do a swap, swap in a 241OR, it was built to withstand a Cummings diesel engine, and is one stout lil T/C.