I just bought a 4wd/4dr/V6/2000 Frontier with a 5 speed transmission. The guy I bought it from thought the clutch might be going bad since he started to notice grinding when going into 3rd gear. Since I have bought the truck I have noticed some grinding, but mainly when down-shifting from 4th to 3rd and on occasion when going from to 2nd to 1st gear. The clutch pedal itself does not feel real stiff and it seems to have a high release point when letting it out. Are the two related? Any ideas what might be causing one or both of these to happen?