Recently purchased 96 cherokee 4L 5spd 4X4 with "command-trac" part-time 4WD and NP-231 transfer-case. Vehicle has 93K mi. I'm not sure if the front hubs are disengaging. The front drive-shaft turns when the front wheels turn even in 2wd. Also, the part-time 4wd light comes on instantly when the lever is pulled. I would think since it has a vac actuator it should take a second or two before the light comes on. When in 4wd, it does seem to work normally. Where does the 4wd indicator light get it's signal from?