My close ratio 5spd seems to work perfectly except for this very loud rattling/ringing in 2nd,3rd,4th and 5th. I can quiet it down a bit if I hold onto the stick shift all the time, it's driving me nuts, so I've started tearing it down. My Haynes manual is mostly useless but found these great vids on youtube that show the entire tear down and rebuild, they are on post #5 on this thread,http://www.classiczcars.com/forums/engine-drivetrain-s30/45179-rebuild-transmission-tool-harber-freight-6-ton-