My wife has an 06 g6 with the 3.5 automatic. The issue we are having is the passenger side front axle is backing out of the transmission. I have changed several axles in the past on different vehicles for friends/family. I have never had an issue like this before. I seems as though when the axle is put in, it seats fine into the transmission. However after driving a few miles (usually less than 10 or so) the axle seems back its way out again. I purchased a new axle but still have the same issue.