So I'm starting to look for parts for a t case swap. The victim is a 98 jeep grand cherokee with the dreaded 249 t case. trans is the 42re. I want to swap in a 242 t case, and I found one out of a 97 GC. Does anyone know if this will be a direct swap? I've googled it till I can't see straight, and all I come up with is how to swap the input shafts ... where are the jeep/mopar guru's?
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Jeep T case help
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231, 242, and 249's are not exactly the same but they share similar dimensions and hard parts. If you're using a 242 out of a ZJ then get the driveshafts to go with it. If you're using a 242 out of an XJ the front driveshaft 'should' interchange, but the rear may have to be cut and refitted.
A guy on Jeep Forum did a write up a while back on the 249-242 swap. He covers all of the bases on what's needed to do it...
https://www.jeepforum.com/forum/f13/...-np242-685644/
The most popular swap I've seen for ZJ's, YJ's & TJ's when I worked in auto salvage was swapping an AW4 in place of 42/44R's in ZJ's and 32R's in YJ's & TJ's. The AW4 trans computer and wiring are required to make it work. 42RE to AW4 Swap: https://www.jeepforum.com/forum/f13/...dii-zj-382739/Last edited by tardis454; September 23, 2018, 05:50 AM.
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Originally posted by Bamfster View PostSo if I'm understanding that write up correctly, all I will need to make the 242 work is the rear drive shaft from the 97?
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So for a grand total of $163, I was able to pick up a 242 tcase, both front and rear drive shafts and a shifter bezel for the 242. Are these things/parts/etc really this inexpensive? or did I find a decent deal? A local jeep shop wanted $250 for a used 249 ... and only give a 30 day warranty. A rebuilt coupler for a 249 is 400 alone ....Whiskey for my men ... and beer for their horses!
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