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View Full Version : NP231 to NV242 swap?

Zoro
November 16th, 2005, 17:31
There's an XJ in the junkyard with a nice NV242 transfer case hooked up to an AW4. How hard would it be to switch it out with mine which is an NP231 hooked up to an AX-15 for the NV242? Also which is better for off-roading? Someone told me all the new H1's have NV242's so that got me wondering.
Timber
November 16th, 2005, 19:39
H1's use the NV 242HD AMG which is rated for 2,340 lb. ft. of torque and 11,500 lbs. GVW versus the NV 242 (ours) which is rated for 1486 lb. ft. of torque and 5,500 lbs. GVW. It'd be nice if XJs had those, though.
XgeekstarX
November 16th, 2005, 19:42
i'll trade you my 242 for your 231.
IntrepidXJ
November 16th, 2005, 19:59
i just did the opposite and went from a 242 to a 231. just make sure you get one with the same input as yours (21 or 23 spline) and i also found out there were different lengths on the inputs within the 23 spline years
TacticalFats
November 16th, 2005, 20:08
I'm mechanically retarded, but if I came across a 242, I'd be tempted to swap.

My work car was a 2003 Exploder w/full time 4wd; it was awesome in the rain.
Zoro
November 17th, 2005, 17:32
I'm mechanically retarded, but if I came across a 242, I'd be tempted to swap.

My work car was a 2003 Exploder w/full time 4wd; it was awesome in the rain.
That's kind of why I want it, I've noticed on the freeway in the rain the back end will start to sway in 2wd, then I put it in 4wd and no more sway. Only thing is I'm afraid of leaving it on and turning one day and busting a yoke or something.

So if the splines are the same there should be no problem with the NV242 going from an auto to a manual, right?

I know that the visous couplers go on these when Full-Time is used too much, if I stay in part-time off road I shouldn't damage anything, right?
Timber
November 17th, 2005, 21:26
The only viscous anything on an XJ is the viscous fan drive. There is no viscous coupler in any XJ t-case unless it was swapped in through the aftermarket from a Grand.
Littlewhitexj
November 18th, 2005, 07:15
^^ The NV242 uses viscous couplers.
IntrepidXJ
November 18th, 2005, 07:22
^^ The NV242 uses viscous couplers.

no it does not. it uses a mechanical diff.

the NV249 uses viscous
Timber
November 18th, 2005, 07:27
^^ The NV242 uses viscous couplers.
You mean NV249--used in Grand Cherokees. Try reading this: http://www.duff.ws/grand_central/tc_swap/249_vs_242.htm