1st question: how do you tell if your wheel bearings are going? I have a low woog woog woog sound coming from the rear of the car and I'm not sure whether its my wheel bearings or my diff. I rotated the tires and it didn't make a difference so I'm pretty sure its not that. Its not very loud yet so its hard to make out but I want to fix it before this road trip I'm taking soon. It seems to get a LITTLE louder when cornering hard but I'm not sure whether I'm just imagining it or what.

2nd question: where the hell is my clutch fluid resevoir? (2000 OBS) I've seen pics of 2.5RSs with the resevoir right next to the brake resevoir but mine has nothing...

thanks!