Pinion Seal Already Leaking?? Took my car in to my friend's shop to get the timing belt changed at 70,000 miles and while driving it home, he heard something he didn't like. Kind of a roaring, whirling from the rear area, increasing the faster you go. I've heard it for a long time, but I think it has gradually gotten worse. Took it in the next morning, and he thinks that one or both wheel bearings need replaced. We are hoping the axle ends are still good. Anyone ever been through this type of repair? and what happened? symptoms? Thanks Please see new question below in my post it is about the pinion seal already leaking.