87 trans aod stalls engine in drive please help
Hey guys I'm new here and just got my second mustang. 1987 LX 5.0 auto aod trans. Bought it a week ago with the trans out of the car. Guy said it would die in all gears. So talking with some tranny shop advise was put a new converter in it. So I bought a new converter and installed the trans today. New fluid and filter. On jacks I try starting it in park and dies. Start it in neutral and it runs but idle is rough but wheels spin. Put it in park, drive, or reverse and tires spin and dies when brakes applied. Not sure if its in the tranny gears or valve body. Please help. Thanks in advance.