i have a gear box problem.. i took down my engine cause it needed a rear main crank seal but i couldn't get the gear box off the engine.. its like pilot shaft is stuck inside the engine or is the type of clutch... i have a nismo super coppermix single clutch..

Welcome to NICO! Sorry to hear that your car is having trouble.

Sometimes the transmission can just get stuck, or you might have a couple more bolts to remove. Either way, here at NICO, we have Factory Service Manuals available free to members. Take a peek at the link in my signature and find the FSM for your car and you'll have all the info you'll ever need to make the repair.