My transmission sometimes grinds when going into 5th gear above 4000 rpm. It only happens sometimes and only when under power. I have not had a chance to pull the Pro 5.0 shifter to check the stops, because I am replacing it with an MGW next week, and I am going to drain and replace the tranny fluid at that time.I also plan to replace the clutch cable and install a UPR firewall adjuster and aluminum quadrant when I do the rest. Do you think it is the syncro, the stops, or what? Help me out!