93 sc2 tranny

k i was driving my 93 sc2 manual and went to put it into third gear and let the clutch out after it was in third and it didnt do anything. the engine just revved up so i tried again and it did the same thing. it does it in every gear. it doesnt grind or anything. no linkages on the outside came off and i was wondering if any1 in here could maybe help me on what the problem could be. thanks alot