What I know is that the tranny came standard with a LSD as it has the stamp. It as stated in the topic is a cable tranny. I pulled it off of my B18B swap. Previously I spent several hours at the local honda dealership to find out that a 90-91 clutch fits it. I've been told it is a Y1 tranny...with some certainty. Now discovering this web page -- http://hybrid2.honda-perf.org/tech/variants.html --has my head spinning. Mainly because I've heard of Y1 and YS1 trannys being the only cable trannys with factory LSDs. Are you confused yet?

 

http://www.ff-squad.com/tech/temp/Bgears.htm