i still haven't figured out the y80 s80 thing, i always get soo confused...it's the one thing on Honda's that doesn't make any sense to me. It's easy to tell if it's an LSD tranny, even if it doesn't have the stamp just look to see if it's an open dif or not but I think the only real way to tell from there is to measure the final drive.

the ls/rs/gs/se & gs-r/sir-g both use the s80 transmission but sometimes the GS-R/SIR-G uses the y80 and one source shows the ls/rs/gs/se uses it too....??? All my b-series charts say differant things but VTECKIDD probably knows something i don't...