Dude, dont use the ZC tranny, the Si is better. ZC axels are better, but sell them and the ZC tranny and get ur $$ back. all u gotta do is switch the mount to 2 other holes, ull C what i mean once its out, then drop it in and plug and play. i believe u gotta changer 3 wires or pins or whatever, but u can easily find a how to on the internet. type in ZC swap and u are sure to fine like 100 sights telling u how to install a ZC into a CRX.