Stalls in Gear, Automatic- Restarts Good- Can Slam it into Gear! EEEK

What is the exact transmission? Lockup or Non Lockup? If lockup is it a Hyd. applied or release? Reason I point all this out is that it might be a valve body/lockup circuit problem also.

after looking on internet for now ive found that it could be a three-speed TorqueFlite if that means something to you.