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2wd to 4wd conversion? (ngs370 question)
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=73&t=49053		 Page 1 of 1
Author:  JeepXLC [ Fri Jan 08, 2010 3:44 pm ]
Post subject:  2wd to 4wd conversion? (ngs370 question)
Image

to me that just looks like someone took a 4wd transmission and put a flange on the back instead of a transfer case. can anyone confirm what is under that flange? is that the same 23 spline output that's on all the 4x4 models? that would make things a lot simpler.
Author:  JeepBumm68 [ Fri Jan 08, 2010 3:57 pm ]
Post subject:  Re: 2wd to 4wd conversion? (ngs370 question)
http://www.lostjeeps.com/forum/phpBB3/posting.php?mode=reply&f=73&t=49053

Read here. Has all the info you need.

Also to convert all you have to do it, one get a 4wd t-case, np231 from a xj is more common, or even a rubicon t-case.

just make sure you match the spline out of your tranny and your fine. We are using a TJ Dana 44 for the rear, np 231, and a xj non-disconnect HPD30.
Author:  TAHOE [ Fri Jan 08, 2010 5:14 pm ]
Post subject:  Re: 2wd to 4wd conversion? (ngs370 question)
Bad Link, puts you in "reply posting mode"
Author:  JeepXLC [ Fri Jan 08, 2010 6:23 pm ]
Post subject:  Re: 2wd to 4wd conversion? (ngs370 question)
so it's 23 spline? same as all the 4wd ones?

i already have an np242, the awd option will be nice.
Author:  tjkj2002 [ Fri Jan 08, 2010 8:04 pm ]
Post subject:  Re: 2wd to 4wd conversion? (ngs370 question)
You will need to swap the trans output shaft to mount a t-case onto it,which means you have to completely tear apart the whole trans to do so,easy to do just very time consuming.
Author:  JeepBumm68 [ Fri Jan 08, 2010 10:10 pm ]
Post subject:  Re: 2wd to 4wd conversion? (ngs370 question)
try this one

http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=73&t=39256
Author:  JeepXLC [ Wed Jan 13, 2010 11:44 am ]
Post subject:  Re: 2wd to 4wd conversion? (ngs370 question)
tjkj2002 wrote:
You will need to swap the trans output shaft

no! tell me it ain't so! these transmissions are still new enough that i don't want to have buy major parts for them. $$$.

so that flange back there doesn't just unbolt? i thought (and hoped) maybe it was set up similar to a hack & tap SYE.
Author:  tjkj2002 [ Wed Jan 13, 2010 8:18 pm ]
Post subject:  Re: 2wd to 4wd conversion? (ngs370 question)
JeepXLC wrote:
tjkj2002 wrote:
You will need to swap the trans output shaft

no! tell me it ain't so! these transmissions are still new enough that i don't want to have buy major parts for them. $$$.

so that flange back there doesn't just unbolt? i thought (and hoped) maybe it was set up similar to a hack & tap SYE.

The 4wd trans output shaft will not have threads on it,sorry but that output shaft will need to be changed.
Author:  JeepXLC [ Thu Jan 14, 2010 5:33 pm ]
Post subject:  Re: 2wd to 4wd conversion? (ngs370 question)
if threads is the only difference i'm gonna run it. it won't be any weaker than a gun drilled axle shaft.
Author:  tjkj2002 [ Thu Jan 14, 2010 5:47 pm ]
Post subject:  Re: 2wd to 4wd conversion? (ngs370 question)
JeepXLC wrote:
if threads is the only difference i'm gonna run it. it won't be any weaker than a gun drilled axle shaft.

because of the treads the 2wd output shaft is shorter then the 4wd so you will not have any spline engagement(or amybe 1/4"-1/2" which is not enough).Oh and the full time option is not a good idea with the manual trans,you will have driveability issues and is why the 242 was never offered behind a manual trans.

Edit...........

After looking at the parts book for the '07 the 6-speed tranny the 2wd and 4wd models use a completely different mainshaft,not fun there swapping that out.
Author:  JeepXLC [ Mon Jan 18, 2010 12:43 pm ]
Post subject:  Re: 2wd to 4wd conversion? (ngs370 question)
tjkj2002 wrote:
the 2wd output shaft is shorter then the 4wd...

After looking at the parts book for the '07 the 6-speed tranny the 2wd and 4wd models use a completely different mainshaft,not fun there swapping that out.


hmm... now that does seem to be a problem. i wonder if the long 231 input would work... on my ax 15 the output only stuck out about a quarter inch from the mating surface and it used the short input. where as some of the automatics have a further recessed output that was about 7/8 of an inch shorter than the ax15 and used a longer 231 input... i'm wondering if that will work...

and yes the 242 and 231 inputs are swappable for anyone that didn't know.

tjkj2002 wrote:
full time option is not a good idea with the manual trans,you will have driveability issues and is why the 242 was never offered behind a manual trans.

as for that, there are countless import performance cars with awd and manual transmissions. i'll take my chances if i can make it work.
Author:  FreedomKJ [ Mon Jan 18, 2010 6:47 pm ]
Post subject:  Re: 2wd to 4wd conversion? (ngs370 question)
JeepXLC wrote:
tjkj2002 wrote:
full time option is not a good idea with the manual trans,you will have driveability issues and is why the 242 was never offered behind a manual trans.

as for that, there are countless import performance cars with awd and manual transmissions. i'll take my chances if i can make it work.


If you look around other boards you'll find that a number of people tried running the 242 behind manual transmissions in XJs and found it to be very, very rough. If I remember correctly, a few even destroyed the tcase that way. The 242 is not a bad tcase at all, but the planetary differential in it apparently does not take well to the shock loads that you get when running a manual tranny.
Author:  JeepXLC [ Mon Jan 25, 2010 11:53 am ]
Post subject:  Re: 2wd to 4wd conversion? (ngs370 question)
ok. fair enough.

i can run a 231 just the same. thanks for the info. that's why i joined. i'm learning things i didn't know i didn't know.
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