Owned my Crossfire for 16 years with no issues until recently. Sometimes the shifter will get stuck in 6th gear and I have to pull over, turn the vehicle off and push the clutch while working the shifter a few times and after 15-20 minutes it will work free again. There are no early symptoms or warnings. Clutch is not slipping or soft, no grinding or burning smells, no leaks, gear works smooth but whenever it feels like it the shifter will hang in 6th gear. Several independent transmission shops have test driven it and find no issues with the clutch or shifter. Anyone had this issue yet and know what the problem is?