Those torsen or torsen gleason diffs work awesome. In the early 80's you could buy them for pretty much any 4wd . they work just like a truetrac [ less bias ]but way better. It is my understanding that it is in the rear only of the new rubicons as well as the rear of the dodge power wagons. It is not in the transfer case though a 242 has viscous coupler. Some of the newer mitsu ,Audis and toyota AWD cars have them in the transfer case. Works really well with an auto as you can brake modulate esp going over rocks or of camber terrain