I have a 2006 WRX and I've started to really notice a problem shifting between third and fourth gear. If I shift over 3k RPMs into fourth it will grind slightly, but once it is actually in gear it is fine. If I shift below that it usually won't grind and slides right into gear. One thing about my car is the clutch pedal is extremely stiff and engages really close to the floor. Is this typical for this year of WRX or could it be the clutch isn't fully disengaging and causing the gears to grind slightly from third to fourth?