How to repair 6spd transmission in a 1996 Pontiac Firebird Formula Firebird? on 1996 Pontiac Firebird

When shifting to second gear the transmission do not engage,but all other gears are responding.There is no grinding noise,burning smell.Sometimes if you shift in second gear and take it out and shift back in it will engage and move slowly.What could be the cause of this and what are the steps in diagnosing this and the steps of repairing it?

Asked by for the 1996 Pontiac Firebird
it appears that the syncro has failed. you need to have the trans removed and disassembled to check out the damage.