Re: Stock AX15 or BA 5/10 in 4.2L 1990 YJ?
I'm sure it's a BA 10/5. The case code is 53005454; that's a BA 10/5. I have a bunch of pictures from different websites, from different angles to compare it to. On top of that I checked my NP 231 transfer case code #. It's 53008210, and that' supposed to have a 23 spline input shaft. By Wednesday I should have a response from DaimlerChrysler to back that up. Plus, ever since I had that transmission put in, I've had difficulty shifting even after the tranny oil was heated up well enough. I know that some clutch components are not interchangeable between the two transmissions. Now, I don't know if bellhousings are included when a rebuilt tranny is ordered or if there just taken from the old one.
So, to put it all together:
After March 3, 1989 Chrysler switched over from the Peugeot BA 10/5 to the Aisin-Warner AX-15 on all 6 cylinder YJ models and because my YJ's build date was March 28, 1990 it should be an AX-15, and because my NP 231 t-case code says it's supposed to have a 23 spline input shaft it should be an AX-15, AND because I've had the uneasy shifting; well, that's not proof enough, but considering the other 2 factors it's reasonable to believe the wrong transsmission is in. In my opinion, it all shouts it should be an AX-15. My only questions are with the inter-changabilty of the bellhousings, and those clutch components that aren't interchangable.