I've got a T-18 T series diff, drum to drum with swaybar attached.
RA40 4.1 ratio fitted with a Cusco RS 2-way LSD center.
The LSD center is about 2 months old and in perfect condition. The oil has been changed 3 times in the two months of use and has been well looked after. The diff comes with all upper and lower arms attached and handbrake cables.