Transmission shifting is a mechanical operation. When the components are made properly, either its in gear or it isn't. Mass production of components that are cast and have not been through a final finishing process will have too much variance. All it takes is a lazy shift and if all the parts don't align perfectly, it will not hold. I've had an 01, 04, 06 and '10. The 2010 ghost shifted before I had gone 25miles after leaving the Dealer when I bought it new and probably a half dozen times after that. The others never did it.