transmission malfuction

Hello, My beast is 06-M5 with 92000km(58000MI) on it. Last 3000km(1800Ml) ago, i changed clutch & fly-wheel and the position sensor. It was becuase of not going up to 7000rpm. After i serviced from dealer, it goes well and i felt much better gear shift. However, nowadays(4 times) i see...