I need help trying to figure out why my 2004 DX Civic 3rd gear grinds wen i shift? Its a manual transmision and it began bout 1 month ago wen i would shift at higher RPM, not red lining though. Now it grinds at low RPM.

Does any1 know whats goin on here, help me out! runaround thank you

Do you have a short shifter? I have the short shifter bracket and when I don't line up perfect when I shift about 6k, sometimes my 3rd gear will grind.

the synchro is going bad.

the synchro is going bad.Yup. Hondas are notorious for this. 1st to 2nd or 2nd to 3rd