Strange 'happening' during a drive today in my 84 308 QV......after some spirited driving this afternoon, I parked the car briefly to run an errand. Upon my return, the car would not engage reverse gear - it would move forward instead! After several tries, a friend had to push the car back so we could leave the parking space - the car kept wanting to move forward in reverse gear. Finally, after about 6-7 tries, reverse was found. Why is this happening, and how can it be fixed?