As I grapple with the foibles of driving a post war sports car I was startled to find one day that I couldn't reverse my car out of my garage and had to resort to it being pushed out. Greater minds than mine diagnosed the problem as being that I'd left the car in overdrive and the solenoid that should prevent it being switched on in first & second gear wasn't working. This has yet to be fixed but in the meantime I need to be careful to limit my use of the overdrive.