Hi. I have 88 gta 305 tpi. Last year i did replace new spark plugs, tps, spark plug cables, engine and transmission filter and oils. Rotor cap. New throttle body gasket and many other parts. Car was driving fine for about a year. After sitting in winter car had a problem with cold start. I had to crank it 2 or 3 times to get it running and then car was driving fine. When car was sitting more than 12hrs the problem come back. I did replace the fuel pump to acdelco and fuel filter. I replaced fuel filter and fuel tank gasket and clean and paint the tank. Car is starting now ok. No problems with cold start. But after car was sitting for about 7 days with trunk in the air something weird start to happening. When car is hot and in drive i Can't take of with more than 1/4 gas becouse car is starting to make jumps. When i take of very slow then this problem is not present. Only when i stop and then try to take of fast. The situation is shown on this movie.
https://youtu.be/4GEKGye7NsM

After this happend 1st time i noticed a big atf spil on the garage flor.


It was atf. Then i checked transmission oil level. It was low. So i added 400 ml of lucas oil to this old transmission. The problem is still present. Any suggestiions? The transmission is gone? I did only fuel filter ans pump. And the problem is present only when starting from 0 mph. When car is in motion this is not happening and when in neutral when i raise rpm car ia not stalling. Last year i replaced transmission and engine main seals. I think they are bad again. Here is the video after i added 400 ml of lucas oil. (It is edited to show 2 times i checked transmision oil level on hot car and in park)

https://youtu.be/cu8yEu8HHd8

Any suggestions would be very helpfull. Thx.

 

By the title I thought you were going to complain the car accelerates too fast and you don't know how to fix it.