ummm...I am 100% postive the Type R LSD fits the GSR tranny's (Y80's), they have the same final drive ratio of 4.40 between the two trannies (type r and gsr).
I just need to know are there any clearances I need to measure? has anyone done it themselves? My friend who just graduated a auto tech school said once the tranny is out its a 2 hour job maximum, unbolt the diff, bolt in the new lsd.