This bell housing is 4.0L era for the AX-15 transmission. Note the provision for an external hydraulic slave cylinder, a great improvement over the earlier YJ-style hydraulic throw-out bearing. This housing requires a cross release arm (shown). There is provision for the factory crankshaft sensor's pickup at the top of the bell housing (must be used with a '91-up 4.0L flywheel). A Mopar Performance EFI conversion kit eliminates the need for this sensor.