99 NP242 into a 91 with a NP242
Thread Starter
Junior Member
Joined: Aug 2009
Posts: 65
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From: california
Year: 1991
Model: Cherokee
Engine: 4.6 stroker
Blew the T-case today on my way home. Found one out of a 99 Grand Cherokee with 110xxx on it. It was a roll over. Just wanted to know if anyone else had done this? I did notice a few differences so far. The output shaft is a different style you could say and my driveshaft fits on it just fine. The BIG question is, will it fit to the AW4?
CF Veteran
Joined: Mar 2009
Posts: 2,750
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From: Visalia, Kalifornia, ussa
Year: 1996
Model: Cherokee
Engine: 4.0
You will need to verify input/output spline counts match, TC to Trans.. The Grands had a couple different counts used due to the fact that there were 4 or 5 different transmissions used in the ZJ alone, that one being from a WJ IDK.
Thread Starter
Junior Member
Joined: Aug 2009
Posts: 65
Likes: 0
From: california
Year: 1991
Model: Cherokee
Engine: 4.6 stroker
CF Veteran


Joined: May 2008
Posts: 5,188
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From: Bristol,Pa
Year: 94
Model: Cherokee
Engine: 4.0L
I dont believe a WJ swap is compatible completely, speed sensor maybe?
Anyway, for a simple bolt in you want any XJ 96-01 with auto trans, any 242 from a ZJ.
Your looking for a 242 23 spline .840" input gear length. If your front case half and input assembly survived without damage you could build a bastard 242 from any earlier 242. You need to take in account the "gearcut" change ~95 model year.
Anyway, for a simple bolt in you want any XJ 96-01 with auto trans, any 242 from a ZJ.
Your looking for a 242 23 spline .840" input gear length. If your front case half and input assembly survived without damage you could build a bastard 242 from any earlier 242. You need to take in account the "gearcut" change ~95 model year.
Thread Starter
Junior Member
Joined: Aug 2009
Posts: 65
Likes: 0
From: california
Year: 1991
Model: Cherokee
Engine: 4.6 stroker
I dont believe a WJ swap is compatible completely, speed sensor maybe? Anyway, for a simple bolt in you want any XJ 96-01 with auto trans, any 242 from a ZJ. Your looking for a 242 23 spline .840" input gear length. If your front case half and input assembly survived without damage you could build a bastard 242 from any earlier 242. You need to take in account the "gearcut" change ~95 model year.
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