Do you know why the 2nd gear doesn't shift smoothly but the other gears do?

I have a 1992 Camaro RS V6. It is a manual 5 speed transmission. I'm having a little problem with one of the gears in the car. Every gear shifts smoothly and with no problem except for 2nd gear. I can get it in gear sometimes but other times it becomes hard to get into and make a loud sound when it doesn't work properly. Also, usually only happens on takeoff not when I'm already driving. Some people say it might shift fork. Do you know what the problem may be? I just wanted an expert opinion before buying any parts.