Having had a complete (4 wheel) brake job done by a private mechanic approximately a year ago, my brakes were "grabbing " and steering wheel shaking at intervals when applying brakes. Another mechanic looked at my brakes and saw nothing wrong. My brakes were flushed by the Shell mechanics to see if it would stop these symptoms and improve the performance of my brakes. They did find a lot of trash in the system and the fluid was thick and apparently dirty. I appreciated their attempts to solve the problem with the least expensive treatment and hoped that it would. resolve the problem. I was told to wait a while to give the fluid a chance to get through the system. To date, that is, 3 days later, the problem has not been resolved.