Has anyone ever done this?
All the B series gearboxs are esentialy the same, so even if you've done it on a GSR teg, or a Del Sol VTEC its still basicly the same procedure.
(mine is a Y1 on an EF9. (1990 SiR Civic )

I have mine out of the car and need to open it up to have a look. (think 3rd gear synchro is dead)
I need to know if it opens up the same way as most other Honda box's do.
That is, you sit it on the bell housing then undo the bolts holding the casing together and lift the back off to revel a stack of gears on thier respective shafts.

 

Yup, that's it. And when you line it up, make sure the little groove in the housing lines up with the top of the gear where there's a piece sticking out. Then the C-clip has to be locked in.