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Unread 03-20-2010, 04:41 PM   #1
PokeyJeep
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Swap a '93 42re for a '97 44re?

I have a '97 ZJ with a 44re, which the previous owner abused. The tranny is almost dead and I can't afford a rebuilt transmission, but I found a '93 42re that I'm thinking I can use a rebuild kit to build into a 44re since they are essentially the same thing.
Am I wrong or is this reasonably doable? I am a moderately experienced mechanic, but I have never tried something like this before, and I would really appreciate the input of some wiser minds.


Last edited by PokeyJeep; 03-20-2010 at 06:43 PM..
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Unread 03-21-2010, 12:35 AM   #2
ratmonkey
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no, the 42re uses weaker internals.

a basic rebuild kit(unless hard parts are broken) is only a few hundred bucks. i have 2 spare trannies if you have a need for hard parts.
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Unread 03-21-2010, 09:46 AM   #3
baxy
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yes you can probably get enough parts between the two with anoverhaul kit to make one trans
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Unread 03-21-2010, 10:08 AM   #4
comptiger5000
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I would just pick up a functional junkyard 44re and a rebuild kit, and re-do the clutches, etc. Then swap it into your Jeep.
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Unread 02-02-2011, 03:22 PM   #5
PokeyJeep
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you guys are a great help, thank you. we broke up so it doesn't matter anymore, but I really appreciate the advice, I have a '98 4.0 now that I love
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Unread 02-02-2011, 03:40 PM   #6
93zjFBI
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if that trans you found is really out of a 93 its not a 42re its an aw-4 trans i have a 93 gc and the trans in it is a aw-4 93 is the ONLY year that got the aw-4 in a gc
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Unread 02-03-2011, 12:31 AM   #7
ratmonkey
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early 93 had the aw4, after the first few months it changed to the 42re.
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Unread 02-04-2011, 04:47 PM   #8
93zjFBI
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i have buddy that works at a jeep dealership and he can back me all 93s have aw-4 trans 94 is the first year for the 42re
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Unread 02-04-2011, 06:05 PM   #9
CatSplat
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Originally Posted by 93zjFBI View Post
i have buddy that works at a jeep dealership and he can back me all 93s have aw-4 trans 94 is the first year for the 42re
Well, then you're both wrong. It's well known that'93s had both AW4s and 42REs, the 1993 ZJ factory service manual confirms it, and to top it off I know a guy with a bone-stock 1993 4.0 ZJ with a 42RE. He even has an account here, if you don't believe me.
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Unread 02-04-2011, 09:19 PM   #10
Newb1995jeepgc
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93 was a messed up year for the Grand Cherokee (also the first year for them) they had wierd gear ratios and trannys. Everything was wierd.
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Unread 02-04-2011, 09:23 PM   #11
JrMechanic
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i have buddy that works at a jeep dealership and he can back me all 93s have aw-4 trans 94 is the first year for the 42re
Guess my '93 42RE is an exception, right?

Very few 93's came with the AW4. 75% + or - a few came with the 42RE.
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Unread 11-15-2011, 04:09 PM   #12
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Originally Posted by CatSplat View Post
Well, then you're both wrong. It's well known that'93s had both AW4s and 42REs, the 1993 ZJ factory service manual confirms it, and to top it off I know a guy with a bone-stock 1993 4.0 ZJ with a 42RE. He even has an account here, if you don't believe me.
I also have a 42re, you will know once you change the trans fluid (different pan gasket)
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Unread 11-15-2011, 04:17 PM   #13
steeleman3
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I thought they came with a 46rh possibly too?
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Unread 11-15-2011, 04:36 PM   #14
comptiger5000
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^ The AW4 (early 93 only) / 42RE (mid 93 - 95) was for 4.0s, and the 46RH (93 - 95) was used in V8s. Then in 96 - 98, 4.0s had the 42RE, 5.2s had the 44RE, 5.9s (98 only) had the 46RE.
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Unread 11-15-2011, 04:58 PM   #15
steeleman3
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^Good info x2. Nice accurate breakdown
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