As I was driving down the highway I felt the car kick hard twice, well I pulled into a parking lot to see if I could figure out what was going on like possible low fluid levels or whatever. When I got back into the car and put it into reverse, NOTHING. Just revving. Okay...lets see what neutral is doing, Locked tight. Will not even roll. I got a friend to pull me backwards and I put the car into drive, 30 mph tops and slipped right out of gear i guess. it's an automatic transmission, 3000gt sl. HELP!!