I am new to this site. I have a 03 WRX & I'm having a slip problem. It would feel like a clutch slip, but here is the twist, the speed goes up as the rpms go up. Car accelerates very slow. It was random a couple months ago, yesterday it was the whole drive to work and back home. Car goes places, but on the way home I started to get noises and some clunking from the trans area. I feel its the center diff or about there. I changed the diff fluid 6,000 miles ago, no metal on the plug. I am willing to take the tail section out of the car. I'm very mechanically inclined, but after reading this post, I get wet feet and think I don't want to do this alone. Any insight on this is appreciated.