first thing is the yj has an axle disconect that has nothing to do with limited slips or locker and even an open diff, the slip fork locks the 2piece axle shaft togather. to eliminate the vacumes going to it, go here and get this
Rustys Offroad: 4x4 Posi-Lok Perm-Lok it basicaly changes your yj front end to be configured like a tj with a non disconecting front axle. this will give you piece of mind knowing that when your shift lever is in 4wd you are really in 4wd. now to your t-case did the truck with the 241 have a solid axle or ifs if it was the ifs the wires were for acctuating the front diff your not going to need that becaus your going to get the perm lok
for your axle.