Difference b/t 2.3 and 5.0 Tranny?

The 4 cylinder transmission has a smaller diameter input shaft. Also, the 4 cylinder transmission is rated for lower torque than the 5.0 T-5. Alot of people will tell you no you can't use the 4 cylinder transmission but I used one for almost 2 years. You will need to get a custom pilot bearing for it, but it can be used at least for short term. Mine held up under some pretty rough conditions but it did grind into almost every gear after awhile.