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It takes a lot of fab work to make any iron 44 fit under a ZJ. The v8 ZJs 96 and after came with an aluminum 44 in the rear
 

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Ive been wondering how the strength of that aluminum 44 compares to an iron 35. better to swap to the 44 or just stuff some alloy shafts in a 35?
 

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I contemplated swapping in a 44a into mine, but I decided to wait and swapped in a 8.8. In my opinion, the 44a would be a better upgrade for the $$ than doing anything to a 35.
 

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Discussion Starter #28
Really depends on what you want to do with the jeep on which axles will serve you best.
 

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Does anyone have a list of the check engine light codes and tranny codes? Im not getting any CEL codes, but I am getting a 13 code on my OD light. I am ASSuming its the speed sensor since my odometer doesn't work, and my tranny is acting funky. Such as my OD kicking off for no reason. The light illuminates and I can't shut it off. Anyways, TCM codes would be pretty awesome right now.
 

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The speed sensor is on the rear output shaft of the transfer case. I can't say for certain, but I doubt it has anything to do with your tranny problems.
 

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If the housing is oval, it is a D35. If it is not a perfect oval, it is a D44HD (Aluminum). The 44HD is very different than the other D44 diffs.

The easiest way to test is to grab a magnet off of your fridge, and see if it sticks to the bottom of the rear diff. It is a 30 second test, go do it.
 

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Renoswl from Reno

It takes a lot of fab work to make any iron 44 fit under a ZJ. The v8 ZJs 96 and after came with an aluminum 44 in the rear


This is the first I heard of 96 and new ZJs have aluminum 44s. I used a magnet on the tubes and the pumpkin (case). The case appeared to be none magnetic (aluminum), no wanted my diff sounds like my grandma’s 1942 washing machine.
 

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What are the main differences between the 4.0L '93-'95 and '96 on up ZJs?

So far I've discovered the following:

- '93-'93.5 came with AW-4 Automatic Transmissions, '93.5 on up came with the 42RE
- '93-'95 had optional AX-15 Manual Transmissions


I'm specifically wondering if a 42RE transmission from a '96+ ZJ will work to replace the one in my '94. I'm assuming all 42RE transmissions were the same?
 

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Your a little off on the years of the ZJ with the manual tranny. The ZJ ONLY came with a Manual Transmission in 93 and early 94. I used to have one.
 

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Thats because yank up on it is the way to remove it
 
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