I have a 06 GTP 3.9L 4 speed automatic, 51,000 miles. The transmission is in questionable condition and doesn't shift the smoothest. I just had a flush and had high hopes of that and a small trans line leak taking care of the problem but I still feel as if the trans isn't the greatest. I ran across a few things about the 3.9L engine being on the undesirable side. Is this because cobalts have similarities with the smaller engines? Since the ~4,000 miles I've owned the car I've had to get 2 oil leaks repaired, 1 trans leak repaired, and have a questionable transmission. Are there commonly know flaws with these motors or transmissions? I already know about the intermediate shaft having problems which I can live with, but I cannot live with significant problems in the engine and drivetrain since I plan to keep this car for an extended period of time. I love my first black car with nice 18" rims, great handling, leather, sun roof, heated seats, and steering wheel controls (nice upgrade from my 99 accord), but I'm leaning towards getting rid of the car. I imagine that advice is going to be baised on an enthusiast forum so I'm asking for people to be honest with themselves.