Aisin AX15 transmission

The AX15 built by Aisin was used in Jeeps with the AMC 242 (4.0L) Inline 6 engine, as well as the AMC 258 (4.2L) Inline 6 engine. This included vehicles such as the Cherokee(XJ), Comanche (MJ), and Wrangler (YJ and TJ). Starting in 1988 (mid-year) and was used in the Cherokee till 2001, where as its final year in the Wrangler models was 1999 and was replaced with the NV3550.

The AX15 had a 23 spline output shaft and a mated to the NP231 as well as the NP207 transfercase. Between 1988 and 1993 the transmission featured an internal slave cylinder, the next year (1994) the transmission was redesigned to have an external slave cylinder for easier maintenance.

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