ATTS is not LSD...... it's a little more complicated. There are a bunch of hydraulic lines and electronic sensors which run through the transmision. It takes extra time over a standard Prelude to work on one of these. Working on an ATTS manual trans. is akin to working on an automatic trans.
Any time someone with a Prelude SH asks me what to do about changing the clutch, I just tell them to wait untill it's completely shot.... that way they have time to save the extra money