Last few times I've gone into the shop they tell me my Front Drivers side wheel bearing is loose. I plan on doing this my self, but how urgent should I be in getting this done. Also, at one shop they said I might need an alignment after I did this. Would I? I'd imagine if it was really bad then maybe, but I don't know. Also, I occasionally get this popping noise while I'm turning at a fairly quick speed. Like, through a neighborhood going around a corner at about 15-20 mph. It seems to come from the passenger side, could this be a sing that the passenger side is also loose? It's not the lower ball joints because it made the noise before and after those were replaced. Might be the uppers. When I replace the hub assembly should I just do both at the same time, or is this just a "as needed" type job?