I've got a r34 gtt series 2, but mine use to be a auto so the diff is a VLSD and its shit, single spinning for daysss..
I had a s15 1.5way kazz lsd i was going to fit but surprisingly its completely different. On the forum everyone says they are the same diff but NOOO..
The r34 gtt has 2 abs sensors, one on each side of the diff where the axels connect and its a short nose r200 diff housing.
The s15 has one abs sensor where the diff connects to the tail shaft hence it has a long nose housing...
SO dunno how people use s15 diffs in r34s...