I'm wondering if anyone knows what this could be. In my '02 WRX, if I drive perfectly straight or turn to the right everything sounds fine. If I turn the wheel slightly left it sounds like a bad CV joint. If I turn farther to the left the sound goes away. If I hit the brakes while the clicking is going on the sound stops instantly. I have looked carefully at the half shafts and the boots are in perfect shape. Car has 132000 miles and is otherwise in great shape. Well maintained and not abused. I hate to replace the half shaft if it is not bad, but it's all I can think of at this point. Any ideas will be appreciated.