Is it something that can be done bolt in without breaking open the case and changing the gears? I plan on doing a hack and tap later on but for this winter I'd like to have the full time 4wd. If it is anyone know what year span for the ZJ? Don't know much about them. Thanks in advance
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ZJ 242 in 1991 XJ?
- Thread starter SBpunk
- Start date
- Location
- Salem, OR
Double post
Last edited:
- Location
- Salem, OR
I'm an idiot, tried to edit my first post not quote lol
- Location
- Salem, OR
91'+ is 23 spline cases. I might not have typed it right, if your jeep is a 86'-90' then you'll have to swap out the input shaft to make it work. But if your jeep is a 91'+ then the 242 will bolt right in, with the exception of the shift linkage. Sorry I'm tired and can't write right lol
all HO jeeps have 23 spline outputs.
Lots of wierdo stuff chryco did with input gears. Some ZJ cases have a pilot tipped shaft, that will not work behind your AW4. Some did not, those will. There seems to be no rhyme or reason as to what is what.
I'd just plan on swapping the input gear. The 231 linkage can be made to work with some mods, but you'll probably want to hunt up one from a limited xj so you can get the right gate and bezel with the proper stops.
Lots of wierdo stuff chryco did with input gears. Some ZJ cases have a pilot tipped shaft, that will not work behind your AW4. Some did not, those will. There seems to be no rhyme or reason as to what is what.
I'd just plan on swapping the input gear. The 231 linkage can be made to work with some mods, but you'll probably want to hunt up one from a limited xj so you can get the right gate and bezel with the proper stops.
OverlandZJ
NAXJA Member # 101
- Location
- Bristol,PA
93-95 V8 ZJ's: 46RH transmission, 1.55" 23 spline input shaft
93-95 I6 ZJ's with the 42RE: .840" 23 spline input (with collar)
93 I6 ZJ's with the AW4 or AX15: .750" 23 spline input
All 96-98 ZJ's: .840" 23 spline input
All 96-01 XJ's: .840" 23 spline input
92-95 XJ's: .750" 23 spline input
91 and older XJ's: .750" 21 spline input
The above is from the 242 swap thread at JF. If you end up with a donor 242 with the correct input length you still have the planetary gear cut change of ~95 to be concerned with.
93-95 I6 ZJ's with the 42RE: .840" 23 spline input (with collar)
93 I6 ZJ's with the AW4 or AX15: .750" 23 spline input
All 96-98 ZJ's: .840" 23 spline input
All 96-01 XJ's: .840" 23 spline input
92-95 XJ's: .750" 23 spline input
91 and older XJ's: .750" 21 spline input
The above is from the 242 swap thread at JF. If you end up with a donor 242 with the correct input length you still have the planetary gear cut change of ~95 to be concerned with.
oldseddie
NAXJA Forum User
- Location
- Fairview, NC
I put a 97 242j out of an XJ in my 87 Comanche w/ax15 and it goes in and out of 4wd much easier than the 94 242j in my 91 Comanche w/aw4.
wizardPC
NAXJA Forum User
- Location
- Nolensville, TN
This is awesome thank you. I'm on my third XJ, and the first two had the np242. This one has a 231 and after the first time it rained here I decided to swap over to a 242. Those 242 tcases are REALLY hard to find in this part of the country in an XJ, but in a ZJ they're all over the place.
OverlandZJ
NAXJA Member # 101
- Location
- Bristol,PA
Easy way to remember this if your XJ is newer..
Any non V8/AW4/5speed ZJ 242 will be a bolt in to any 96+ XJ, otherwise you have some work to do.
oldseddie
NAXJA Forum User
- Location
- Fairview, NC
I think the 242j I put in my son's 91 Comanche was from a 96 xj. Only had to source the shift gate and bezel from an XJ 242.
Damn mine is a 92' so seems like it'd be more work than its worth.