The AX-15 is a medium duty five speed transmission with an aluminum
case. It is manufactured by Aisin in Japan and, although they are not
compatible, the same model transmission is used in some Toyota trucks.
In 1994 the clutch slave cylinder was moved to the outside of the
bellhousing, so these AX-15s have a different input bearing retainer
to accommodate the different throwout bearing. The input shaft is also
slightly different, so a different pilot bushing is used. All AX-15s
have a 1 1/8" 10 spline input shaft and a 23 spine output shaft.
The AX-15 was first used in Cherokees (XJ) and Comanches (MJ) with
the 4.0L engine. In mid 1989, the AX-15 was used in Wranglers (YJ)
with the 4.2L engine and it continued to be used with the 4.0L engine.
The first year of the Grand Cherokee (ZJ), the AX-15 was rare option
only with the 4.0L engine. The AX-15 is still used in TJs and XJs with
the 4.0L engine.
Side view of the AX-15 transmission
Back view of the AX-15 transmission
Front view of the AX-15