Recently, I purchased a 2005 Subaru Legacy GT Wagon. 2.5L Turbo engine (EJ255?) with the 5EAT trans. Previous owner had replaced the stock turbo with a VF46 and had a custom intake fitted. I started using it as my daily driver and one day on my way to work I was doing about 80 down the highway when suddenly I was getting no power from the gas. The car began downshifting on its own and slowing down. I pulled over to the side of the road and tried to start it. It would start, run for maybe 2-5 seconds (very roughly) and then die. I read the codes and there were two. A P0700 (trans control) and a P0725 (Engine Speed Sensor). Got it towed back to my home and replaced the crankshaft position sensor (which is one of the recommended fixes for a P0725) and then tried to start it but it wouldn't start at all. It sounded like the starter didn't have enough torque to move the engine. I tried jumping it and that didn't help. I tried manually moving the crank with a breaker bar but the engine would not budge. I took it to a dealership to have them try and see what was wrong with it and they didn't tell me anything that I didn't already know. They told me "The engines locked up" and they wanted at least 1500 just to take it apart and diagnose it. At this point the car is sitting in my garage waiting for me to do something with it so I am open to suggestions at this point as to what the issue could be.