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Old 03-15-2013, 06:25 AM   #1
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Soooo, stan I've got a friend looking to swap an atlas into a TJ. Its a little 4 banger with the ax-5, so its a 21 spline output shaft on the trans. Advance adapters (people who make the atlas) sells a 4.3:1 atlas II, they claim it bolts up and you just need to hammer mod the trans tunnel to go flat belly, along with add a little metal to mount the twin sticks up. Have you had any experience with swapping an atlas t case into a 4cyl jeep?

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Old 03-15-2013, 06:27 AM   #2
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http://www.advanceadapters.com/produ...-applications/

The link I sent my friend for reference.

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Old 03-15-2013, 01:16 PM   #3
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Soooo, stan I've got a friend looking to swap an atlas into a TJ. Its a little 4 banger with the ax-5, so its a 21 spline output shaft on the trans. Advance adapters (people who make the atlas) sells a 4.3:1 atlas II, they claim it bolts up and you just need to hammer mod the trans tunnel to go flat belly, along with add a little metal to mount the twin sticks up. Have you had any experience with swapping an atlas t case into a 4cyl jeep?
Ok, heres the deal with this mod.
You can buy the Atlas t case that bolts up to this jeep, however, the AX5 trans and the D35 rear end is now the weak link, and you've just added a 5.1 t case that weighs 110lbs dry to this mix, and now you have a disaster. The d35, as everyone knows, is barely worth using for a boat anchor, and the AX5 trans was ok for a four cylinder, and was designed as a light duty trans, but never used in the 6 cylinder TJs, so not near strong enough for this combination. The AX 15 trans or better yet, the nv3550, could be used, but now the cost comes into play, how much do you want to invest in a four cylinder TJ? As easy as this conversion sounds, theres more to the picture. If spending $3500-4000 on this TJ is ok with their budget, then its doable. Finding a 241OR t case and a AX15 for a reasonable amount isnt that easy.
The other option is the Teralow kit, but as a daily driver, and having a two hour trip just to go wheeling, the reliability issues come into play. If this were a weekend toy, the project would be much easier and less expensive.
Thanks, hope I have helped.
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Old 03-15-2013, 01:24 PM   #4
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Yeah I see what you mean by all that. Rubicons make things so easy lol. But also with the t-case being behind how is it putting strain on the trans besides the weight of it?
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Old 03-15-2013, 01:25 PM   #5
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Yeah I see what you mean by all that. Rubicons make things so easy lol
Yes they do, they spoil you.
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Old 03-15-2013, 01:28 PM   #6
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Yes they do, they spoil you.
Edited my post. I know it being a geardriven case its heavy as shit, but is it just the weight that strains the trans?
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Old 03-15-2013, 02:09 PM   #7
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Edited my post. I know it being a geardriven case its heavy as shit, but is it just the weight that strains the trans?
Not only the weight, but the gear reduction factor of the 5.1 t case
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Old 03-15-2013, 02:24 PM   #8
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How so if its only taking the input and multiplying it to the output shafts? So only the driveshafts, ring and pinions, diffs axleshafts would feel the increased torque, correct?
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Old 03-15-2013, 05:03 PM   #9
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How so if its only taking the input and multiplying it to the output shafts? So only the driveshafts, ring and pinions, diffs axleshafts would feel the increased torque, correct?
Sorry, I was referring to the rear diff. Other than the added weight, the trans isnt affected so much, but the sensable thing would be to not put a $2300 transfer case behind a sub par trans.
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Old 03-15-2013, 05:06 PM   #10
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Sorry, I was referring to the rear diff. Other than the added weight, the trans isnt affected so much, but the sensable thing would be to not put a $2300 transfer case behind a sub par trans.
But the beauty of bring able to swap input shafts if you decide to convert to the ax15 or the Nv3550 is pretty sweet.

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