well my 4.0l with 4.10's and 35's doesn't like highway speeds much just not regearing yet.... I don't do enough highway driving with it to make it worth it for me yet but probably will happen within the next year
1993 Jeep Wrangler
4.0L Tom Woods rear HD shaft
D30 w/yukon alloys, lock right, jb4x4 bracket, Rusty's HD tie rod 8.8w/ LSD,SOA xj rear 100" wheelbase, homemade greasable boomerang shackles, SS braided lines, 1" prothane body lift, 35" TrXus M/T, smitty built XRC.
lots of gen right armor and rear stinger.