Does transmission fluid have to be a certain temperature other than room before put in the transmission?

What is your question?

I have problems when my transmission will not shit into 4th gear when it gets warm. I have already replaced the solenoid switch. I did not warm or heat the fluid when added. Does the fluid have to be a certain temperature when added?

What makes this problem better or worse?

Transmission @ times won’t shift to 4th when it gets warm

How long has your 2006 Mini Cooper had this problem?

Months