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Go Back   Fun In B.C. > All about your Ride > Jeep Talk

Jeep Talk The only true 4x4

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  #1  
Old 06-09-2014, 03:02 PM
Cankickr Cankickr is offline
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transmission Q:

I have a 87 xj with a aw4 and a np242 t-case
the case snapped the out put shaft..I pulled it and its 21t spline count
I found these are in 87-89xj and 4 banger models..and alittle tough
to locate...
Q can I swap in a newer aw4 tranny with a 23 spline ? Is there any difference
or will it bolt right up...I figure I'm in this boat now so why not upgrade to a stronger drive line and parts are everywhere for a 23t...
any info would be appreciated ..

Thanks in advance...
cheers..Mike
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Old 06-09-2014, 04:02 PM
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should be able to swap it out with a newer one, but instead of the 242 why not put the more common 231 in it when u put the new tranny in, I think if you stay pre 95 for transmissions you will be ok, but just do a good once over on the new trans just in case,
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Old 06-09-2014, 04:51 PM
Cankickr Cankickr is offline
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Ok cool I couldn't see much of a difference ..if I put in a 231 will I need the linkage and floor plate? They're the same just the 242 has an awd option for slippery conditions..no
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Old 06-09-2014, 05:05 PM
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23 spline AW4 is shorter than the 21 spline by 1 1/4 to 1 1/2 ish inches and OBD2 transmissions 94 1/2 and up, are different electronically than OBD1 versions
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Old 06-09-2014, 05:38 PM
Cankickr Cankickr is offline
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Oh good to know..is the wheel base the same? If I find someone parting one out and grab the tranny/tcase and rear shaft It'll be good or will I need the front aswell?

sorry for all the Q's just weighing my options
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Old 06-09-2014, 08:31 PM
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im glad mikey chimed in, I wasn't too positive on that note, im not much xj anymore now that I don't have one,
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