L.a. noire trophy not working ps3?

I've played through L.a. noire and got all trophies but when i got the 95 cars for auto fanatic i did not get the trophy (auto-fanatic) despite getting the 100% game complete trophy which requires all cars, i have tried delete and reinstalling the game and I have made sure I defiantly have all 95 cars (checked on statistics screen, Car showroom and Rockstar social club), does anyone know anyway i can get this trophy to work?