Grinding noise when in gear. Idles smooth in N or P.
My car idles smooth but as soon as i drop it into gear, I hear a grinding noise coming from the rear of the car. When stopping for a red light i also hear and feel a clunk when the speed gets to around 10mph. After that the car begins to idle rough, likes it going to stall. While driving however, all is good ig: Shifts are smooth and fast. There was a high pitch whine while driving the car before the grinding noise started.
My car is a 2002 Auto 330i.
Professional help and those that had these symptoms please chime in.