Originally Posted by iwaxmyjimmy
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.