Hey guys. I'm having an issue with my 02 WRX. The steering seems to bind when going around curves, and sometimes just making turns. The steering only binds when the car is in motion. Never sitting still. I've flushed the system twice. Each time the car seems to do fine for a week or so, then goes back to the binding issue. No leaks from the rack, no noise from the pump. No visible mechanical issues at all. I have also lubed the universal joint on the steering shaft. Please help.