So I bought a brand new GSR transmission off ebay a few months back (said it was an ITR but well its a GSR and the guy is a idiot) But i'd really like to have the closer gear ratios of the ITR/B16 and what I'm wondering is if I could just buy the 2/3/4 gears and just stick them staright into my GSR using all the GSR syncros and sliders ext, and just get the main/countershaft gears for the ITR/B16, if so anyone know where I can find a mainshaft 2nd gear for a ITR, hondapartsunlimited has all the other counter/main shaft gears except the mainshaft 2nd.

 

Main shaft 2nd is built in the main shaft

 

GSR has a different 3/4 shift fork and slider IIRC

In my opinion it's not worth the cost to build vs finding a B16 trans

 

true, I could prob. sell this transmisson for 1200bucks and find a good used ITR

 

And Transmissions are not my thing at all as anyone could tell

 

Hubs/sliders/synchros are the same for all B18C's.

You can swap 3/4/5 without issue. If you want to swap 2nd you'll need to shim the mainshaft (1st and 2nd are built into the mainshaft).