For the last month my 80 has been shifting a little slower, I didn't think much of it since the 80s aren't known for their fast shifting, but yesterday, I put my car in park and left the AC running while I was waiting for someone. About 10 minutes of keeping the car in park the RPMs started jumping after being stable for the 10 minutes prior. After the RPMs had been jumping for about 30 seconds the car just died and the dashboard lit up like it usually does when it dies. I put the key back into the ignition instantly after it died and it started back again with no issues with RPM. I just checked my transmission fluid after letting the the car sit over night and the fluid read HOT despite not driving it over 16 hours ago. I attached below what the transmission dipstick read. I am a complete newb with this. Oil level and engine temps are fine. Any help would be greatly appreciated!!!!!!!!!!!!!!