hi i have a trans problem that i cant figure out.. the car will drive when its cold, yet as soon as the motor gets warm it acts like its in neutral.. changed trans filter fluid, 2 trans speed sensors. pulled the motor and trans out of the car.. looking at the torque converter it looks good. The fluid was good when I replaced the filter.. there were no abnormal amounts of metal in the pan..
does anyone have any Idea what it could be?? Like maybe a clogged vacuum line or something/

 

how many miles on transmission? sounds like a clutch issue