Join Date: Sep 2009
Location: Cumberland, Maryland
FYI your 4 banger is an AX-5. The swap can be made with a bell housing from a Dodge Dakota with the 2.5 in it.
The AX-5 is a weak tranny.
The AX-15 didn't appear in the Wrangler until very late '89 early '90. Before that it was the BA10/5. The spline count is different.
The BA10/5 and AX5 are both 21 spline, and the AX15 is 23, so if you replace the tranny with an AX15, you will need an NP231-J transfer case. Not the np207 or np231/amc. they are both 21 spline and will not work with the AX15.
Hope that helps.
interesting, I didn't think you could use an ax-15 behind a 2.5L. Good to know.
First Jeep was an 1989 YJ, 6 cylinder 4.2L , 258. Nuttered and TeamRushed, Weber 38 DGES, Now, I'm venturing into the world of Grand Cherokees