I have 98 Xj with 4.0, aw4, np231, dana 30 and 8.24'' rear. My jeep used to have be hard to start in Park 6-7 sometimes requiring more than one attemp, but would crank up fast in N on the first try in 2-3 sec. I replaced the NSS on the tranny with a new one from crown. It cranks in P and N and the reverse lights work but it takes awhile to start in P and N sometimes requiring cranking more than once. Im not sure If I need to adjust NSS again or look at something else. Battery is new, starter relay is new, Had recent tuneup this year.