I have a 2002 Subaru WRX with 55K miles on the car. I just bought the car about 4 weeks ago. Today when I was driving the car and I shifted into second gear at around 5K RPM's (not speed shifting), there was a really loud bang and then a lot of clanking noises. I came to a stop and had some trouble getting the car out of second gear and back into neutral. Then, i couldn't get the car back into second. Then there was constant clanking. What happened?