I am in desperate need of some help here. I have a 98 legacy outback with auto trans. One day while driving down freeway i heard a clunk from under the car. Looked up at the gauges to find my rpms and speed mirroring each other. The trans would not shift out of 3rd gear. I parked the car and tried all the other gears. No response in reverse or any other gear but 3rd. When put in nuetral it can only be rolled forward. Long story short i put a newer transmission in it. Initially it drove very well. Then one day i took a long trip in it and bam. Load clunk noise followed by the exact same symptoms as before. Any and all help is greatly appreciated.