On my dash, the check engine light is on.....Checked the codes and it shows that the shift solenoid A is bad..... I took it to a transmission shop and they checked it out, and they said that there is nothing wrong with the A shift solenoid..... When the car is first started and ran, it goes through like a quick shift of all of the gears..... I guess that is a good explanation of my problem..... it doesnt slip when driving it, it only seems to do it when the transmission is cold....... Had the transmission flushed, but didnt change the filter..... Maybe if I change the tranny filter and put some good fluid and maybe a tranny additive in it, will that help..... Does the TCC have anything to do with the shifting??????