I while back I blew out my clutch coming home on the freeway. I drove home over and hour and a half by matching the revs and slipping it into gear. I got the clutch replaced and started driving it again about a month ago. It seemed to shift real hard, and first gear would grind if I tried to move the shifter into it over 20mph. I found the guy who changed my clutch also did my tranny fluid with 90wt gear oil, which I replaced. Now it shifts smooth again, but 1st gear is still grinding real bad if I try to shift into it over 20mph. I think it may be the 1st gear synchro going bad from all the grinding that occurred. Am I on base here? What else might it be? Thanks for any help.