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Old 02-18-2014, 03:19 PM
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AW4 swap

Been I while since I hit you up for your brilliance lol !!!

So I hate me 42rle. Im reading every post I can at pirate, here, and jeepforum....

Do you know off hand how much longer the AW4 is than the 42?

Im running an LJ so my DL is already longer than the tj. Im planning to run the stock tj gas "tank and stretch my ass out +4 in the future so i dont think the length will mess me up. I also might try to run a clocked 300 so i think that will save me a few more inches there minus the adapter plate.

Can you see any problems with this setup or you think id be better off with like a 700r4 or th350 ? I just hate this dog of a 42rle. Only time it works right is off road...

Are there any AW4 swap hints or tricks that may help me out? Yes I read Stu's stuff. Im looking for personal experiences.


Thanks everyone !!!!

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Old 02-18-2014, 03:34 PM   #2
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Well I went from AX15 to AW4 so I'd be searching for the dimensions on yours. The AW4 is longer than the AX15 by 1.5" or so, I forget exactly. I also put a super shorty SYE on the 231 so no issues on losing DS length there. I did a Genright 4 link rear stretch so I'm sitting at 98ish now without front mods yet. So I haven't really answered any of your questions lol. Stu's info was 90% of my reference info. I did not do the TCU, instead I run fully manual solenoid control using RADesigns Rail and Rock shifters. I love it set up like this, total control and makes for a pretty easy swap without building a wire harness, taping into existing wiring, and no purchase of a TCU. Clocking the tcase (re-drilling) was a little tricky, but if you look hard enough you'll find a few templates out there, or anyone with some machine shop access can make quick work of it. And yes, absolutely run an external cooler, with a fan and thermostat.

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Old 02-18-2014, 05:35 PM   #3
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I seem to remember with the newer TJs there is a big road block with the CKP. The timing of the AW4 flex plate is not compatible with the newer TJ. I think I've seen the swap done once successfully and the person had to move the CKP to the front of the engine.
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Old 02-24-2014, 11:29 AM
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Thanks for the thoughts. More I dive into it, the better a th350 and dana 300 start to look. Just get away from the computer side of the transmission.
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Old 02-25-2014, 10:09 AM   #5
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I'll just mention again the TCU is not mandatory with AW4. Sounds funny because you'll have an auto that wont automatically shift. It's like a manual valve body on others, manual control of shift points. I'll try to snap a pic of my shifter setup. I do very little pavement time so I dig this setup, but it's so easy I really wouldn't care as a DD either. RADesign shifters is what I used.
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Old 02-25-2014, 10:43 AM   #6
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I love the AW4, it's a great transmission. That said, exactly what problem are you having with the 42RLE?

Also, what axle ratio are you running and what size tires? And behind the 4.0L, I'm no fan of the TH350 or 700r4 which is more suitable for a big V8.
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Old 02-25-2014, 02:09 PM   #7
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Quote:
Originally Posted by SHAWN3R View Post
Thanks for the thoughts. More I dive into it, the better a th350 and dana 300 start to look. Just get away from the computer side of the transmission.

The 700R4 doesn't require a computer, but at the same time will require more power from the engine to move the vehicle.

700R4, 700 Raptor Transmission from PATC, 700R4 4L60E 48RE 4L80E

Here's a place you can poke around and learn more about the 700R4


Novak Jeep Conversions - Home

Another site with info
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Old 02-25-2014, 02:47 PM   #8
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Originally Posted by SHAWN3R View Post
Are there any AW4 swap hints or tricks that may help me out? Yes I read Stu's stuff. Im looking for personal experiences.
the AW4 swap is a good choice. I believe there is a build thread on JeepForum documenting a 42RLE-->AW4 swap. IIRC, they used a Hesco CPS relocation kit, which moves the CPS to the front of the motor by the harmonic balancer.

Also, don't worry much about the length. Run a JB Conversions SS SYE and you'll have plenty of room with the extra wheelbase of the LJ.

the downside to the AW4 is you can't control 1st and 2nd independently like the 42RLE. You get 1 & 2 together. there are electrical work arounds, although involved.
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Old 02-25-2014, 04:16 PM   #9
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the downside to the AW4 is you can't control 1st and 2nd independently like the 42RLE. You get 1 & 2 together. there are electrical work arounds, although involved.
That's one thing that was addressed with the way I did my shifters, easy to lock into 1st. Takes the Rail shifter (1-4 control) and the Rock shifter (PRNO3L) from RAdesigns but it works great.

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