Ever since I ground the heck out of my shift lever, I have noticed that it takes a lot more effort to shift from gear to gear. This is starting to become problematic, since ever once in a while it doesn't shift gears. Does anyone have an idea what is causing this problem? I wonder if changing the gear oil would help, it is about time for this anyway. Plus I would be able check to see if there is any metal debris in the oil - hopefully no! Hopefully, it's not the clutch either.